Add ci reqs

add ci reqs and locate the autoload global file.

Author: LuisTejedaS

codegens/php-guzzle/lib/phpGuzzle.js

@@ -138,7 +138,8 @@ function validateIsFunction (validateFunction) {
   */
 function getSnippetHeader () {
   return '<?php\n' +
-    'require \'vendor/autoload.php\';\n' +
+    '$composerHome = substr(shell_exec(\'composer config home -g\'), 0, -1).\'/vendor/autoload.php\';\n' +
+    'require $composerHome; // your path to autoload.php \n' +
     'use Psr\\Http\\Message\\ResponseInterface;\n' +
     'use GuzzleHttp\\Exception\\RequestException;\n' +
     'use GuzzleHttp\\Client;\n' +

npm/ci-requirements.sh

@@ -75,3 +75,9 @@ dependencies:
   dart pub get
 popd &>/dev/null;
 
+echo "Installing dependencies required for tests in codegens/php-guzzle"
+  php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
+  php composer-setup.php
+  php -r "unlink('composer-setup.php');"
+  sudo mv composer.phar /usr/bin/composer
+  composer.phar global require guzzlehttp/guzzle php:7.4.1