Update packages.json

AssertionError: 'date' unexpectedly found in {'details': 'https://github.com/afterdesign/jshintify/tags', 'sublime_text': '<3000', 'date': '2013-08-13 17:51:00'} : The key "date" is redundant when "details" is specified
Merge pull request #1 from FichteFoll/patch-1

Update packages.json