and Run haml-lint and rubocop on Ruby 3.1

```
Offenses:

lib/git_stats/stats_view/view.rb:53:9: C: [Correctable] Style/FileWrite: Use File.write.
        File.open(write_file, 'w') { |f| f.write output }
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
```

- Add info to authors and email
- Use `license` rather than `licenses`