Bare minimum to update to woohoolabs/yin:^4.0 (#16)

* Updated composer packages to latest versions

* Rewrote QP\WoohoolabsYinBundle\Request\Request.

extend WoohooLabs\Yin\JsonApi\Request\JsonApiRequest instead of implementing WoohooLabs\Yin\JsonApi\Request\JsonApiRequestInterface

* Revert bump of phpspec version

* fixed typo + preemptively added major version bump.

See discussion at #16 (comment)

composer.json

@@ -12,8 +12,8 @@
     ],
     "require": {
         "php": "^7.1.0",
-        "symfony/psr-http-message-bridge": "^1.0.2",
-        "woohoolabs/yin": "^3.0",
+        "symfony/psr-http-message-bridge": "^1.2",
+        "woohoolabs/yin": "^4.0",
         "nyholm/psr7": "^1.1",
         "sensio/framework-extra-bundle": "^5.4"
     },