vendor/guzzlehttp/psr7/src/AppendStream.php

 <?php
+
 namespace GuzzleHttp\Psr7;
 
 use Psr\Http\Message\StreamInterface;
@@ -61,7 +62,7 @@ class AppendStream implements StreamInterface
 
     public function getContents()
     {
-        return copy_to_string($this);
+        return Utils::copyToString($this);
     }
 
     /**
@@ -98,6 +99,8 @@ class AppendStream implements StreamInterface
         }
 
         $this->streams = [];
+
+        return null;
     }
 
     public function tell()

vendor/guzzlehttp/psr7/src/BufferStream.php

 <?php
+
 namespace GuzzleHttp\Psr7;
 
 use Psr\Http\Message\StreamInterface;
@@ -49,6 +50,8 @@ class BufferStream implements StreamInterface
     public function detach()
     {
         $this->close();
+
+        return null;
     }
 
     public function getSize()

vendor/guzzlehttp/psr7/src/CachingStream.php

 <?php
+
 namespace GuzzleHttp\Psr7;
 
 use Psr\Http\Message\StreamInterface;
@@ -131,7 +132,7 @@ class CachingStream implements StreamInterface
     private function cacheEntireStream()
     {
         $target = new FnStream(['write' => 'strlen']);
-        copy_to_stream($this, $target);
+        Utils::copyToStream($this, $target);
 
         return $this->tell();
     }

vendor/guzzlehttp/psr7/src/DroppingStream.php

 <?php
+
 namespace GuzzleHttp\Psr7;
 
 use Psr\Http\Message\StreamInterface;

vendor/guzzlehttp/psr7/src/FnStream.php

 <?php
+
 namespace GuzzleHttp\Psr7;
 
 use Psr\Http\Message\StreamInterface;
@@ -34,6 +35,7 @@ class FnStream implements StreamInterface
 
     /**
      * Lazily determine which methods are not implemented.
+     *
      * @throws \BadMethodCallException
      */
     public function __get($name)

vendor/guzzlehttp/psr7/src/Header.php

+<?php
+
+namespace GuzzleHttp\Psr7;
+
+final class Header
+{
+    /**
+     * Parse an array of header values containing ";" separated data into an
+     * array of associative arrays representing the header key value pair data
+     * of the header. When a parameter does not contain a value, but just
+     * contains a key, this function will inject a key with a '' string value.
+     *
+     * @param string|array $header Header to parse into components.
+     *
+     * @return array Returns the parsed header values.
+     */
+    public static function parse($header)
+    {
+        static $trimmed = "\"'  \n\t\r";
+        $params = $matches = [];
+
+        foreach (self::normalize($header) as $val) {
+            $part = [];
+            foreach (preg_split('/;(?=([^"]*"[^"]*")*[^"]*$)/', $val) as $kvp) {
+                if (preg_match_all('/<[^>]+>|[^=]+/', $kvp, $matches)) {
+                    $m = $matches[0];
+                    if (isset($m[1])) {
+                        $part[trim($m[0], $trimmed)] = trim($m[1], $trimmed);
+                    } else {
+                        $part[] = trim($m[0], $trimmed);
+                    }
+                }
+            }
+            if ($part) {
+                $params[] = $part;
+            }
+        }
+
+        return $params;
+    }
+
+    /**
+     * Converts an array of header values that may contain comma separated
+     * headers into an array of headers with no comma separated values.
+     *
+     * @param string|array $header Header to normalize.
+     *
+     * @return array Returns the normalized header field values.
+     */
+    public static function normalize($header)
+    {
+        if (!is_array($header)) {
+            return array_map('trim', explode(',', $header));
+        }
+
+        $result = [];
+        foreach ($header as $value) {
+            foreach ((array) $value as $v) {
+                if (strpos($v, ',') === false) {
+                    $result[] = $v;
+                    continue;
+                }
+                foreach (preg_split('/,(?=([^"]*"[^"]*")*[^"]*$)/', $v) as $vv) {
+                    $result[] = trim($vv);
+                }
+            }
+        }
+
+        return $result;
+    }
+}

vendor/guzzlehttp/psr7/src/InflateStream.php

 <?php
+
 namespace GuzzleHttp\Psr7;
 
 use Psr\Http\Message\StreamInterface;

vendor/guzzlehttp/psr7/src/LazyOpenStream.php

 <?php
+
 namespace GuzzleHttp\Psr7;
 
 use Psr\Http\Message\StreamInterface;
@@ -34,6 +35,6 @@ class LazyOpenStream implements StreamInterface
      */
     protected function createStream()
     {
-        return stream_for(try_fopen($this->filename, $this->mode));
+        return Utils::streamFor(Utils::tryFopen($this->filename, $this->mode));
     }
 }

vendor/guzzlehttp/psr7/src/LimitStream.php

 <?php
+
 namespace GuzzleHttp\Psr7;
 
 use Psr\Http\Message\StreamInterface;

vendor/guzzlehttp/psr7/src/Message.php

+<?php
+
+namespace GuzzleHttp\Psr7;
+
+use Psr\Http\Message\MessageInterface;
+use Psr\Http\Message\RequestInterface;
+use Psr\Http\Message\ResponseInterface;
+
+final class Message
+{
+    /**
+     * Returns the string representation of an HTTP message.
+     *
+     * @param MessageInterface $message Message to convert to a string.
+     *
+     * @return string
+     */
+    public static function toString(MessageInterface $message)
+    {
+        if ($message instanceof RequestInterface) {
+            $msg = trim($message->getMethod() . ' '
+                    . $message->getRequestTarget())
+                . ' HTTP/' . $message->getProtocolVersion();
+            if (!$message->hasHeader('host')) {
+                $msg .= "\r\nHost: " . $message->getUri()->getHost();
+            }
+        } elseif ($message instanceof ResponseInterface) {
+            $msg = 'HTTP/' . $message->getProtocolVersion() . ' '
+                . $message->getStatusCode() . ' '
+                . $message->getReasonPhrase();
+        } else {
+            throw new \InvalidArgumentException('Unknown message type');
+        }
+
+        foreach ($message->getHeaders() as $name => $values) {
+            if (strtolower($name) === 'set-cookie') {
+                foreach ($values as $value) {
+                    $msg .= "\r\n{$name}: " . $value;
+                }
+            } else {
+                $msg .= "\r\n{$name}: " . implode(', ', $values);
+            }
+        }
+
+        return "{$msg}\r\n\r\n" . $message->getBody();
+    }
+
+    /**
+     * Get a short summary of the message body.
+     *
+     * Will return `null` if the response is not printable.
+     *
+     * @param MessageInterface $message    The message to get the body summary
+     * @param int              $truncateAt The maximum allowed size of the summary
+     *
+     * @return string|null
+     */
+    public static function bodySummary(MessageInterface $message, $truncateAt = 120)
+    {
+        $body = $message->getBody();
+
+        if (!$body->isSeekable() || !$body->isReadable()) {
+            return null;
+        }
+
+        $size = $body->getSize();
+
+        if ($size === 0) {
+            return null;
+        }
+
+        $summary = $body->read($truncateAt);
+        $body->rewind();
+
+        if ($size > $truncateAt) {
+            $summary .= ' (truncated...)';
+        }
+
+        // Matches any printable character, including unicode characters:
+        // letters, marks, numbers, punctuation, spacing, and separators.
+        if (preg_match('/[^\pL\pM\pN\pP\pS\pZ\n\r\t]/u', $summary)) {
+            return null;
+        }
+
+        return $summary;
+    }
+
+    /**
+     * Attempts to rewind a message body and throws an exception on failure.
+     *
+     * The body of the message will only be rewound if a call to `tell()`
+     * returns a value other than `0`.
+     *
+     * @param MessageInterface $message Message to rewind
+     *
+     * @throws \RuntimeException
+     */
+    public static function rewindBody(MessageInterface $message)
+    {
+        $body = $message->getBody();
+
+        if ($body->tell()) {
+            $body->rewind();
+        }
+    }
+
+    /**
+     * Parses an HTTP message into an associative array.
+     *
+     * The array contains the "start-line" key containing the start line of
+     * the message, "headers" key containing an associative array of header
+     * array values, and a "body" key containing the body of the message.
+     *
+     * @param string $message HTTP request or response to parse.
+     *
+     * @return array
+     */
+    public static function parseMessage($message)
+    {
+        if (!$message) {
+            throw new \InvalidArgumentException('Invalid message');
+        }
+
+        $message = ltrim($message, "\r\n");
+
+        $messageParts = preg_split("/\r?\n\r?\n/", $message, 2);
+
+        if ($messageParts === false || count($messageParts) !== 2) {
+            throw new \InvalidArgumentException('Invalid message: Missing header delimiter');
+        }
+
+        list($rawHeaders, $body) = $messageParts;
+        $rawHeaders .= "\r\n"; // Put back the delimiter we split previously
+        $headerParts = preg_split("/\r?\n/", $rawHeaders, 2);
+
+        if ($headerParts === false || count($headerParts) !== 2) {
+            throw new \InvalidArgumentException('Invalid message: Missing status line');
+        }
+
+        list($startLine, $rawHeaders) = $headerParts;
+
+        if (preg_match("/(?:^HTTP\/|^[A-Z]+ \S+ HTTP\/)(\d+(?:\.\d+)?)/i", $startLine, $matches) && $matches[1] === '1.0') {
+            // Header folding is deprecated for HTTP/1.1, but allowed in HTTP/1.0
+            $rawHeaders = preg_replace(Rfc7230::HEADER_FOLD_REGEX, ' ', $rawHeaders);
+        }
+
+        /** @var array[] $headerLines */
+        $count = preg_match_all(Rfc7230::HEADER_REGEX, $rawHeaders, $headerLines, PREG_SET_ORDER);
+
+        // If these aren't the same, then one line didn't match and there's an invalid header.
+        if ($count !== substr_count($rawHeaders, "\n")) {
+            // Folding is deprecated, see https://tools.ietf.org/html/rfc7230#section-3.2.4
+            if (preg_match(Rfc7230::HEADER_FOLD_REGEX, $rawHeaders)) {
+                throw new \InvalidArgumentException('Invalid header syntax: Obsolete line folding');
+            }
+
+            throw new \InvalidArgumentException('Invalid header syntax');
+        }
+
+        $headers = [];
+
+        foreach ($headerLines as $headerLine) {
+            $headers[$headerLine[1]][] = $headerLine[2];
+        }
+
+        return [
+            'start-line' => $startLine,
+            'headers' => $headers,
+            'body' => $body,
+        ];
+    }
+
+    /**
+     * Constructs a URI for an HTTP request message.
+     *
+     * @param string $path    Path from the start-line
+     * @param array  $headers Array of headers (each value an array).
+     *
+     * @return string
+     */
+    public static function parseRequestUri($path, array $headers)
+    {
+        $hostKey = array_filter(array_keys($headers), function ($k) {
+            return strtolower($k) === 'host';
+        });
+
+        // If no host is found, then a full URI cannot be constructed.
+        if (!$hostKey) {
+            return $path;
+        }
+
+        $host = $headers[reset($hostKey)][0];
+        $scheme = substr($host, -4) === ':443' ? 'https' : 'http';
+
+        return $scheme . '://' . $host . '/' . ltrim($path, '/');
+    }
+
+    /**
+     * Parses a request message string into a request object.
+     *
+     * @param string $message Request message string.
+     *
+     * @return Request
+     */
+    public static function parseRequest($message)
+    {
+        $data = self::parseMessage($message);
+        $matches = [];
+        if (!preg_match('/^[\S]+\s+([a-zA-Z]+:\/\/|\/).*/', $data['start-line'], $matches)) {
+            throw new \InvalidArgumentException('Invalid request string');
+        }
+        $parts = explode(' ', $data['start-line'], 3);
+        $version = isset($parts[2]) ? explode('/', $parts[2])[1] : '1.1';
+
+        $request = new Request(
+            $parts[0],
+            $matches[1] === '/' ? self::parseRequestUri($parts[1], $data['headers']) : $parts[1],
+            $data['headers'],
+            $data['body'],
+            $version
+        );
+
+        return $matches[1] === '/' ? $request : $request->withRequestTarget($parts[1]);
+    }
+
+    /**
+     * Parses a response message string into a response object.
+     *
+     * @param string $message Response message string.
+     *
+     * @return Response
+     */
+    public static function parseResponse($message)
+    {
+        $data = self::parseMessage($message);
+        // According to https://tools.ietf.org/html/rfc7230#section-3.1.2 the space
+        // between status-code and reason-phrase is required. But browsers accept
+        // responses without space and reason as well.
+        if (!preg_match('/^HTTP\/.* [0-9]{3}( .*|$)/', $data['start-line'])) {
+            throw new \InvalidArgumentException('Invalid response string: ' . $data['start-line']);
+        }
+        $parts = explode(' ', $data['start-line'], 3);
+
+        return new Response(
+            (int) $parts[1],
+            $data['headers'],
+            $data['body'],
+            explode('/', $parts[0])[1],
+            isset($parts[2]) ? $parts[2] : null
+        );
+    }
+}

vendor/guzzlehttp/psr7/src/MessageTrait.php

 <?php
+
 namespace GuzzleHttp\Psr7;
 
 use Psr\Http\Message\StreamInterface;
@@ -17,7 +18,7 @@ trait MessageTrait
     /** @var string */
     private $protocol = '1.1';
 
-    /** @var StreamInterface */
+    /** @var StreamInterface|null */
     private $stream;
 
     public function getProtocolVersion()
@@ -117,7 +118,7 @@ trait MessageTrait
     public function getBody()
     {
         if (!$this->stream) {
-            $this->stream = stream_for('');
+            $this->stream = Utils::streamFor('');
         }
 
         return $this->stream;
@@ -194,7 +195,7 @@ trait MessageTrait
             }
 
             return trim((string) $value, " \t");
-        }, $values);
+        }, array_values($values));
     }
 
     private function assertHeader($header)

vendor/guzzlehttp/psr7/src/MimeType.php

+<?php
+
+namespace GuzzleHttp\Psr7;
+
+final class MimeType
+{
+    /**
+     * Determines the mimetype of a file by looking at its extension.
+     *
+     * @param string $filename
+     *
+     * @return string|null
+     */
+    public static function fromFilename($filename)
+    {
+        return self::fromExtension(pathinfo($filename, PATHINFO_EXTENSION));
+    }
+
+    /**
+     * Maps a file extensions to a mimetype.
+     *
+     * @param string $extension string The file extension.
+     *
+     * @return string|null
+     *
+     * @link http://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x/conf/mime.types
+     */
+    public static function fromExtension($extension)
+    {
+        static $mimetypes = [
+            '3gp' => 'video/3gpp',
+            '7z' => 'application/x-7z-compressed',
+            'aac' => 'audio/x-aac',
+            'ai' => 'application/postscript',
+            'aif' => 'audio/x-aiff',
+            'asc' => 'text/plain',
+            'asf' => 'video/x-ms-asf',
+            'atom' => 'application/atom+xml',
+            'avi' => 'video/x-msvideo',
+            'bmp' => 'image/bmp',
+            'bz2' => 'application/x-bzip2',
+            'cer' => 'application/pkix-cert',
+            'crl' => 'application/pkix-crl',
+            'crt' => 'application/x-x509-ca-cert',
+            'css' => 'text/css',
+            'csv' => 'text/csv',
+            'cu' => 'application/cu-seeme',
+            'deb' => 'application/x-debian-package',
+            'doc' => 'application/msword',
+            'docx' => 'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
+            'dvi' => 'application/x-dvi',
+            'eot' => 'application/vnd.ms-fontobject',
+            'eps' => 'application/postscript',
+            'epub' => 'application/epub+zip',
+            'etx' => 'text/x-setext',
+            'flac' => 'audio/flac',
+            'flv' => 'video/x-flv',
+            'gif' => 'image/gif',
+            'gz' => 'application/gzip',
+            'htm' => 'text/html',
+            'html' => 'text/html',
+            'ico' => 'image/x-icon',
+            'ics' => 'text/calendar',
+            'ini' => 'text/plain',
+            'iso' => 'application/x-iso9660-image',
+            'jar' => 'application/java-archive',
+            'jpe' => 'image/jpeg',
+            'jpeg' => 'image/jpeg',
+            'jpg' => 'image/jpeg',
+            'js' => 'text/javascript',
+            'json' => 'application/json',
+            'latex' => 'application/x-latex',
+            'log' => 'text/plain',
+            'm4a' => 'audio/mp4',
+            'm4v' => 'video/mp4',
+            'mid' => 'audio/midi',
+            'midi' => 'audio/midi',
+            'mov' => 'video/quicktime',
+            'mkv' => 'video/x-matroska',
+            'mp3' => 'audio/mpeg',
+            'mp4' => 'video/mp4',
+            'mp4a' => 'audio/mp4',
+            'mp4v' => 'video/mp4',
+            'mpe' => 'video/mpeg',
+            'mpeg' => 'video/mpeg',
+            'mpg' => 'video/mpeg',
+            'mpg4' => 'video/mp4',
+            'oga' => 'audio/ogg',
+            'ogg' => 'audio/ogg',
+            'ogv' => 'video/ogg',
+            'ogx' => 'application/ogg',
+            'pbm' => 'image/x-portable-bitmap',
+            'pdf' => 'application/pdf',
+            'pgm' => 'image/x-portable-graymap',
+            'png' => 'image/png',
+            'pnm' => 'image/x-portable-anymap',
+            'ppm' => 'image/x-portable-pixmap',
+            'ppt' => 'application/vnd.ms-powerpoint',
+            'pptx' => 'application/vnd.openxmlformats-officedocument.presentationml.presentation',
+            'ps' => 'application/postscript',
+            'qt' => 'video/quicktime',
+            'rar' => 'application/x-rar-compressed',
+            'ras' => 'image/x-cmu-raster',
+            'rss' => 'application/rss+xml',
+            'rtf' => 'application/rtf',
+            'sgm' => 'text/sgml',
+            'sgml' => 'text/sgml',
+            'svg' => 'image/svg+xml',
+            'swf' => 'application/x-shockwave-flash',
+            'tar' => 'application/x-tar',
+            'tif' => 'image/tiff',
+            'tiff' => 'image/tiff',
+            'torrent' => 'application/x-bittorrent',
+            'ttf' => 'application/x-font-ttf',
+            'txt' => 'text/plain',
+            'wav' => 'audio/x-wav',
+            'webm' => 'video/webm',
+            'webp' => 'image/webp',
+            'wma' => 'audio/x-ms-wma',
+            'wmv' => 'video/x-ms-wmv',
+            'woff' => 'application/x-font-woff',
+            'wsdl' => 'application/wsdl+xml',
+            'xbm' => 'image/x-xbitmap',
+            'xls' => 'application/vnd.ms-excel',
+            'xlsx' => 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
+            'xml' => 'application/xml',
+            'xpm' => 'image/x-xpixmap',
+            'xwd' => 'image/x-xwindowdump',
+            'yaml' => 'text/yaml',
+            'yml' => 'text/yaml',
+            'zip' => 'application/zip',
+        ];
+
+        $extension = strtolower($extension);
+
+        return isset($mimetypes[$extension])
+            ? $mimetypes[$extension]
+            : null;
+    }
+}

vendor/guzzlehttp/psr7/src/MultipartStream.php

 <?php
+
 namespace GuzzleHttp\Psr7;
 
 use Psr\Http\Message\StreamInterface;
@@ -71,7 +72,7 @@ class MultipartStream implements StreamInterface
         }
 
         // Add the trailing boundary with CRLF
-        $stream->addStream(stream_for("--{$this->boundary}--\r\n"));
+        $stream->addStream(Utils::streamFor("--{$this->boundary}--\r\n"));
 
         return $stream;
     }
@@ -84,7 +85,7 @@ class MultipartStream implements StreamInterface
             }
         }
 
-        $element['contents'] = stream_for($element['contents']);
+        $element['contents'] = Utils::streamFor($element['contents']);
 
         if (empty($element['filename'])) {
             $uri = $element['contents']->getMetadata('uri');
@@ -100,9 +101,9 @@ class MultipartStream implements StreamInterface
             isset($element['headers']) ? $element['headers'] : []
         );
 
-        $stream->addStream(stream_for($this->getHeaders($headers)));
+        $stream->addStream(Utils::streamFor($this->getHeaders($headers)));
         $stream->addStream($body);
-        $stream->addStream(stream_for("\r\n"));
+        $stream->addStream(Utils::streamFor("\r\n"));
     }
 
     /**
@@ -131,7 +132,7 @@ class MultipartStream implements StreamInterface
         // Set a default Content-Type if one was not supplied
         $type = $this->getHeader($headers, 'content-type');
         if (!$type && ($filename === '0' || $filename)) {
-            if ($type = mimetype_from_filename($filename)) {
+            if ($type = MimeType::fromFilename($filename)) {
                 $headers['Content-Type'] = $type;
             }
         }

vendor/guzzlehttp/psr7/src/NoSeekStream.php

 <?php
+
 namespace GuzzleHttp\Psr7;
 
 use Psr\Http\Message\StreamInterface;

vendor/guzzlehttp/psr7/src/PumpStream.php

 <?php
+
 namespace GuzzleHttp\Psr7;
 
 use Psr\Http\Message\StreamInterface;
@@ -51,7 +52,7 @@ class PumpStream implements StreamInterface
     public function __toString()
     {
         try {
-            return copy_to_string($this);
+            return Utils::copyToString($this);
         } catch (\Exception $e) {
             return '';
         }
@@ -66,6 +67,8 @@ class PumpStream implements StreamInterface
     {
         $this->tellPos = false;
         $this->source = null;
+
+        return null;
     }
 
     public function getSize()

vendor/guzzlehttp/psr7/src/Query.php

+<?php
+
+namespace GuzzleHttp\Psr7;
+
+final class Query
+{
+    /**
+     * Parse a query string into an associative array.
+     *
+     * If multiple values are found for the same key, the value of that key
+     * value pair will become an array. This function does not parse nested
+     * PHP style arrays into an associative array (e.g., `foo[a]=1&foo[b]=2`
+     * will be parsed into `['foo[a]' => '1', 'foo[b]' => '2'])`.
+     *
+     * @param string   $str         Query string to parse
+     * @param int|bool $urlEncoding How the query string is encoded
+     *
+     * @return array
+     */
+    public static function parse($str, $urlEncoding = true)
+    {
+        $result = [];
+
+        if ($str === '') {
+            return $result;
+        }
+
+        if ($urlEncoding === true) {
+            $decoder = function ($value) {
+                return rawurldecode(str_replace('+', ' ', $value));
+            };
+        } elseif ($urlEncoding === PHP_QUERY_RFC3986) {
+            $decoder = 'rawurldecode';
+        } elseif ($urlEncoding === PHP_QUERY_RFC1738) {
+            $decoder = 'urldecode';
+        } else {
+            $decoder = function ($str) { return $str; };
+        }
+
+        foreach (explode('&', $str) as $kvp) {
+            $parts = explode('=', $kvp, 2);
+            $key = $decoder($parts[0]);
+            $value = isset($parts[1]) ? $decoder($parts[1]) : null;
+            if (!isset($result[$key])) {
+                $result[$key] = $value;
+            } else {
+                if (!is_array($result[$key])) {
+                    $result[$key] = [$result[$key]];
+                }
+                $result[$key][] = $value;
+            }
+        }
+
+        return $result;
+    }
+
+    /**
+     * Build a query string from an array of key value pairs.
+     *
+     * This function can use the return value of `parse()` to build a query
+     * string. This function does not modify the provided keys when an array is
+     * encountered (like `http_build_query()` would).
+     *
+     * @param array     $params   Query string parameters.
+     * @param int|false $encoding Set to false to not encode, PHP_QUERY_RFC3986
+     *                            to encode using RFC3986, or PHP_QUERY_RFC1738
+     *                            to encode using RFC1738.
+     * @return string
+     */
+    public static function build(array $params, $encoding = PHP_QUERY_RFC3986)
+    {
+        if (!$params) {
+            return '';
+        }
+
+        if ($encoding === false) {
+            $encoder = function ($str) { return $str; };
+        } elseif ($encoding === PHP_QUERY_RFC3986) {
+            $encoder = 'rawurlencode';
+        } elseif ($encoding === PHP_QUERY_RFC1738) {
+            $encoder = 'urlencode';
+        } else {
+            throw new \InvalidArgumentException('Invalid type');
+        }
+
+        $qs = '';
+        foreach ($params as $k => $v) {
+            $k = $encoder($k);
+            if (!is_array($v)) {
+                $qs .= $k;
+                if ($v !== null) {
+                    $qs .= '=' . $encoder($v);
+                }
+                $qs .= '&';
+            } else {
+                foreach ($v as $vv) {
+                    $qs .= $k;
+                    if ($vv !== null) {
+                        $qs .= '=' . $encoder($vv);
+                    }
+                    $qs .= '&';
+                }
+            }
+        }
+
+        return $qs ? (string) substr($qs, 0, -1) : '';
+    }
+}

vendor/guzzlehttp/psr7/src/Request.php

 <?php
+
 namespace GuzzleHttp\Psr7;
 
 use InvalidArgumentException;
@@ -51,7 +52,7 @@ class Request implements RequestInterface
         }
 
         if ($body !== '' && $body !== null) {
-            $this->stream = stream_for($body);
+            $this->stream = Utils::streamFor($body);
         }
     }
 

vendor/guzzlehttp/psr7/src/Response.php

 <?php
+
 namespace GuzzleHttp\Psr7;
 
 use Psr\Http\Message\ResponseInterface;
@@ -100,7 +101,7 @@ class Response implements ResponseInterface
         $this->statusCode = $status;
 
         if ($body !== '' && $body !== null) {
-            $this->stream = stream_for($body);
+            $this->stream = Utils::streamFor($body);
         }
 
         $this->setHeaders($headers);
@@ -134,7 +135,7 @@ class Response implements ResponseInterface
         if ($reasonPhrase == '' && isset(self::$phrases[$new->statusCode])) {
             $reasonPhrase = self::$phrases[$new->statusCode];
         }
-        $new->reasonPhrase = $reasonPhrase;
+        $new->reasonPhrase = (string) $reasonPhrase;
         return $new;
     }
 

vendor/guzzlehttp/psr7/src/ServerRequest.php

@@ -79,8 +79,10 @@ class ServerRequest extends Request implements ServerRequestInterface
      * Return an UploadedFile instance array.
      *
      * @param array $files A array which respect $_FILES structure
-     * @throws InvalidArgumentException for unrecognized values
+     *
      * @return array
+     *
+     * @throws InvalidArgumentException for unrecognized values
      */
     public static function normalizeFiles(array $files)
     {

vendor/guzzlehttp/psr7/src/Stream.php

 <?php
+
 namespace GuzzleHttp\Psr7;
 
 use Psr\Http\Message\StreamInterface;
@@ -76,8 +77,10 @@ class Stream implements StreamInterface
     public function __toString()
     {
         try {
-            $this->seek(0);
-            return (string) stream_get_contents($this->stream);
+            if ($this->isSeekable()) {
+                $this->seek(0);
+            }
+            return $this->getContents();
         } catch (\Exception $e) {
             return '';
         }
@@ -193,7 +196,7 @@ class Stream implements StreamInterface
     public function seek($offset, $whence = SEEK_SET)
     {
         $whence = (int) $whence;
-        
+
         if (!isset($this->stream)) {
             throw new \RuntimeException('Stream is detached');
         }