Update authors node in composer.json

`authors` node wasn't valid in composer.json.
Merge pull request #4985 from j0k3r/patch-4

Update authors node in composer.json
Change :before pseudo-element to :after

As discussed here: https://github.com/zurb/foundation/issues/4960 the :after pseudo-element would be more semantically correct.
Change :before pseudo-element to :after

As discussed here: https://github.com/zurb/foundation/issues/4960 the :after pseudo-element would be more semantically correct.
Merge pull request #4986 from winghouchan/semantic-dropdown-construct--4960

Semantic dropdown construct  4960
Merge pull request #2 from zurb/master

Update Foundation