Exclude specific gems from autoupdate

[ajb]

In my Gemfile, I've locked the gem active_model_serializers to a specific version:

gem 'active_model_serializers', '0.8.3'

While 0.8.3 is an old version, the newer versions are basically different gems, and I'm waiting until a stable 1.0.0 release in order to upgrade. The upgrade process for that gem is pretty strange: https://github.com/rails-api/active_model_serializers#release-candidate-please-read

So when I run gemnasium autoupdate, it tries updating that gem, even though I've explicitly locked the version in my Gemfile. This leads to the command taking a long time to execute (#33).

I know changing the default behavior would probably be a bad idea, especially because some people specify gem versions directly in their Gemfile instead of using Gemfile.lock as intended. But maybe some kind of flag that can be passed in order to exclude certain gems from the autoupdate?