Here's the relevant part of my gemspec:
spec.add_development_dependency "bundler", "~> 1.3"
spec.add_development_dependency "rake"
spec.add_development_dependency "rspec", "~> 2.13.0"
spec.add_dependency "addressable"
spec.add_dependency "activesupport", "> 3.0.11"
Travis is failing for ruby 1.8.7 because it tries to install ActiveSupport 4.0, but Rails 4 does not support ruby 1.8.7. I'm afraid this might be an issue when users try to use the gem, even though it might be compatible with 1.8.7.
How can I fix this, while also keeping Rails 4 support? I don't want to use "~> 3.0.11"
on my gemspec.