I have been developing gem. For test my gem I use ActiveRecord. When I run test I get some error because my gem doesn't support version 5.0 of ActiveRecord.
But in my gemspec I have:
spec.add_development_dependency 'activerecord', '~> 4.2'
Also I tried to user Gemfile.local but it didn't get positive result.
What a right way for set particular version for a gem?