fixes #1673 - Foreman doesn't work with ruby_parser 2.0.6
Explicitly stating the version of ruby_parser that works with Foreman.Otherwise you might get:
superclass mismatch for class Environment (TypeError)
fixes #1673 - Foreman doesn't work with ruby_parser 2.0.6
Explicitly stating the version of ruby_parser that works with Foreman.
Otherwise you might get: