Updated diff dependency
feature #252 Updated diff dependency (dantleech)

This PR was merged into the master branch.

Discussion
----------

Updated diff dependency

Updated Diff dependency to 1.1

There does not seem to be any functional difference and all the tests pass. Have kept the `@dev` tag -- but maybe it would be better to remove it.

Commits
-------

06d571d Updated diff dependency
removed @dev in composer.json