Fix 'gon' gem install failure. refs #5955
Created by: yasuoza
Fix missing 'gon' dependency update.
As commented in https://github.com/gitlabhq/gitlabhq/pull/5955#issuecomment-31593344
Created by: yasuoza
Fix missing 'gon' dependency update.
As commented in https://github.com/gitlabhq/gitlabhq/pull/5955#issuecomment-31593344