Fix gemfile capybara version

Author: Sam Phippen

Gemfile

@@ -40,10 +40,12 @@ end
 
 
 # Capybara versions that support RSpec 3 only support RUBY_VERSION >= 1.9.3
-if RUBY_VERSION >= '1.9.3' && RAILS_VERSION < '5.1'
-  gem 'capybara', '~> 2.2.0', :require => false
-else
-  gem 'capybara', '~> 2.13', :require => false
+if RUBY_VERSION >= '1.9.3' 
+  if /5(\.|-)1/ === RAILS_VERSION || "master" == RAILS_VERSION
+    gem 'capybara', '~> 2.13', :require => false
+  else
+    gem 'capybara', '~> 2.2.0', :require => false
+  end
 end
 
 # Rack::Cache 1.3.0 requires Ruby >= 2.0.0

Gemfile-rails-dependencies

@@ -36,7 +36,7 @@ when nil, false, ""
 else
   gem "rails", version
 
-  if version >= '5.1'
+  if version >= '5-1-stable'
     gem "puma"
   end
 end