Log Message:
Update ruby-ffi-yajl to 2.2.3.

2.2.3 (2016-01-07)

Full Changelog

Merged pull requests:

* fix validate_utf8: false encoding coercion #75 (lamont-granquist)
* Remove ruby 1.9.2 support #73 (lamont-granquist)
* Use github-changelog-generator to generate CHANGELOG.md file #72
  (lamont-granquist)