4.2-fix-associate-on-morphTo
deleting from eloquent model will work with joins
Merge pull request #5703 from sporchia/add_joins_to_delete

deleting from eloquent model will work with joins
Merge pull request #5103 from jarektkaczyk/4.2-fix-associate-on-morphTo

4.2-fix-associate-on-morphTo
[4.2] Collection - DDRYs up the code a little more
Merge pull request #5706 from KennedyTedesco/collection-4.2

[4.2] Collection - DRYs up the code a little more
Revert array_replace_recursive because of existing packages.
Merge branch '4.2'