Merge pull request #1491 from ydah/rake_newcop

Change the `rake newcop` task to output `<<next>>` instead of the next minor version for config/default.yml

Rakefile

@@ -74,14 +74,7 @@ task :new_cop, [:cop] do |_task, args|
   generator.write_source
   generator.write_spec
   generator.inject_require(root_file_path: 'lib/rubocop/cop/rspec_cops.rb')
-  generator.inject_config(config_file_path: 'config/default.yml',
-                          version_added: bump_minor_version)
+  generator.inject_config
 
   puts generator.todo
 end
-
-def bump_minor_version
-  major, minor, _patch = RuboCop::RSpec::Version::STRING.split('.')
-
-  "#{major}.#{minor.succ}.0"
-end