Use ~> to allow security patches while remaining Ruby 1.9-compatible
Use ~> to allow security patches while remaining Ruby 1.9-compatible

The pessimistic version constraint will allow patch updates to tins,
e.g., if 1.6.1 is released, without installing tins 1.7.0 or greater.

sferik/coveralls-ruby,lemurheavy/coveralls-ruby,tagliala/coveralls-ruby