Remove 'master' (mapping to github:rails/rails) from the Rails versions.
Remove 'master' (mapping to github:rails/rails) from the Rails versions.

Unfortunately, gemspecs can't deal with dependencies pulled straight
from github. ;-(

We can't test against Rails 5, anyway, because infopark_webcrm_sdk is
limited to "~> 4.0".

Skudo/infopark-crm-helpers,Skudo/infopark-crm-helpers