Check for empty identity_columns after array_diff
Merge pull request #219 from AfzalivE/master

Check for empty identity_columns after array_diff. Thanks @AfzalivE
Update composer.json

Remove 'laravelbook/ardent' workaround as master package has been updated.
Merge pull request #221 from codextends/master

Switch back to laravelbook/ardent : dev master
Merged master.