add support for rubocop-sorbet 0.5.1 (channel rubococp-0-92)

[britneywright]

Resolves #232

Add's support for the rubocop-sorbet plugin in channel rubocop-0-92.

I made a test project to run the codeclimate CLI against: https://github.com/britneywright/rubocop-sorbet-test

For local testing:

• Pull down this PR
  • IMAGE_NAME=codeclimate/codeclimate-rubocop-test make image
• Pull down the rubocop-sorbet-test project
  • bundle install
  • codeclimate analyze -e rubocop-test --dev

Should see an output similar to the following:

Starting analysis
Running rubocop-test: Done!

== Gemfile (2 issues) ==
1: No Sorbet sigil found in file. Try a `typed: true` to start (you can also use `rubocop -a` to automatically add this). [rubocop-test]
1: Prefer single-quoted strings when you don't need string interpolation or special symbols. [rubocop-test]

== thing.rb (2 issues) ==
1: No Sorbet sigil found in file. Try a `typed: false` to start (you can also use `rubocop -a` to automatically add this). [rubocop-test]
1: No Sorbet sigil found in file. Try a `typed: true` to start (you can also use `rubocop -a` to automatically add this). [rubocop-test]

Analysis complete! Found 4 issues.