@mixin phpdocs
Merge pull request #13 from velosipedist/hotfix/mixin-phpdoc

@mixin phpdocs
Changed property check for object
Merge pull request #16 from karolisg/master

Changed property check for object
Arrays::find returns null when not found

This matches other similar array::find methods (such as underscore.js).
Merge pull request #17 from altmetric/array-find-should-return-null

Arrays::find returns null when not found
Bump version
Switch to support 4.1 as 4.2 is 5.4+
Fix dependencies