This project is unmaintained. I stopped using it years ago. You shouldn't use it. You shouldn't use any version of JSMin. There are much better tools available now.
Here are some of them:
|lib||Ported GerHobbelt's fix to jsmin.c https://github.com/GerHobbelt/JSMi…|
|test||Raising useful exceptions|
|HISTORY||Fix Ruby 1.9 compatibility; minor performance improvements|
|README.md||Stop using this thing, dammit.|
|Rakefile||Raising useful exceptions|
|jsmin.gemspec||Create Rake task to generate gemspec for github; Ignore some files|