Bump to new Yin major version.
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 https://github.com/qpautrat/woohoolabs-yin-bundle/pull/16#discussion_r303952618