0.12.1: Merge pull request #6 from j0k3r/patch-1

Fix yaml validation

0.12.0

Do not test against PHP 5.4 anymore

0.11.1: Merge pull request #3 from j0k3r/sf3.0-deprecation

Remove Symfony 3.0 deprecation

0.7.3: Merge pull request #1 from cmnty-peterm/patch-1

Incorrect syntax to call load from $loader