Issue #2304081 by damiankloip: Upgrade Guzzle to version 4.1.3.

composer.lock

core/vendor/composer/ClassLoader.php

core/vendor/composer/autoload_real.php

core/vendor/composer/installed.json

core/vendor/guzzlehttp/guzzle/CHANGELOG.md

core/vendor/guzzlehttp/guzzle/composer.json

core/vendor/guzzlehttp/guzzle/docs/_static/logo.png

core/vendor/guzzlehttp/guzzle/docs/clients.rst

core/vendor/guzzlehttp/guzzle/docs/quickstart.rst

core/vendor/guzzlehttp/guzzle/docs/testing.rst

...vendor/guzzlehttp/guzzle/src/Adapter/Curl/CurlFactory.php

core/vendor/guzzlehttp/guzzle/src/Adapter/StreamAdapter.php

core/vendor/guzzlehttp/guzzle/src/ClientInterface.php

core/vendor/guzzlehttp/guzzle/src/Cookie/CookieJar.php

core/vendor/guzzlehttp/guzzle/src/Event/RequestEvents.php

core/vendor/guzzlehttp/guzzle/src/Message/MessageFactory.php

core/vendor/guzzlehttp/guzzle/src/Post/MultipartBody.php

core/vendor/guzzlehttp/guzzle/src/Post/PostBody.php

core/vendor/guzzlehttp/guzzle/src/Query.php

core/vendor/guzzlehttp/guzzle/src/QueryParser.php