Update ServiceProvider.php

Make version model configurable

Fix config key

Merge pull request mpociot#21 from geoffbeaumont/master

Fix new version when touched by related model mpociot#11

Merge pull request mpociot#13 from williamoliveira/patch-1

Fix unserialize() for Postgres

Merge pull request mpociot#8 from dubcanada/patch-2

Change getAuthUserId to protected

Merge pull request mpociot#6 from nhowell/patch-1

Fix diff() incorrect behavior

Added "diff" method to versions

Modified syntax for reverting models, added tests, beautified code

Removed unset of versionableDirtyData