ghn v2.2.0 released: Add -v option

http://rubygems.org/gems/ghn/versions/2.2.0

ChangeLog:

• New Feature:
  • Add -v (--verbose) option by @masatomo https://github.com/kyanny/ghn/pull/33

https://github.com/kyanny/ghn/releases/tag/v2.2.0