Make Rubocop sort like Ruby, VS Code and others

[koppen]

Without this the following order is correct according to Rubocop:

1. "capistrano3-puma"
2. "capistrano-bundler"

However Ruby says something different:

> ["capistrano3-puma", "capistrano-bundler"].sort
=> ["capistrano-bundler", "capistrano3-puma"]

and sorting using sort(1), VS Code and Sublime Text gives us the same ordering as Ruby:

1. "capistrano-bundler"
2. "capistrano3-puma"