rubocop-solidus extension support

[safafa]

Hello Hound team,

We use rubocop-solidus, we require it in our rubocop configuration.
We are getting the following comment from Hound in our PR

Some files could not be reviewed due to errors:

cannot load such file -- rubocop-solidus

cannot load such file -- rubocop-solidus
/home/linters/.bundle/gems/rubocop-0.54.0/lib/rubocop/config_loader_resolver.rb:15:in `require'
/home/linters/.bundle/gems/rubocop-0.54.0/lib/rubocop/config_loader_resolver.rb:15:in `block in resolve_requires'
/home/linters/.bundle/gems/rubocop-0.54.0/lib/rubocop/config_loader_resolver.rb:11:in `each'
/home/linters/.bundle/gems/rubocop-0.54.0/lib/rubocop/config_loader_resolver.rb:11:in `resolve_requires'
/home/linters/.bundle/gems/rubocop-0.54.0/lib/rubocop/config_loader.rb:43:in `load_file'
/home/linters/.bundle/gems/rubocop-0.54.0/lib/rubocop/config_loader.rb:83:in `configuration_from_file'
/home/linters/.bundle/gems/rubocop-0.54.0/lib/rubocop/config_store.rb:44:in `for'
/home/linters/.bundle/gems/rubocop-0.54.0/lib/rubocop/cli.rb:181:in `apply_default_formatter'
/home/linters/.bundle/gems/rubocop-0.54.0/lib/rubocop/cli.rb:40:in `run'
/home/linters/.bundle/gems/rubocop-0.54.0/bin/rubocop:13:in `block in '
/usr/local/lib/ruby/2.6.0/benchmark.rb:308:in `realtime'
/home/linters/.bundle/gems/rubocop-0.54.0/bin/rubocop:12:in `'
/home/linters/.bundle/bin/rubocop:23:in `load'
/home/linters/.bundle/bin/rubocop:23:in `'
/usr/local/lib/ruby/2.6.0/bundler/cli/exec.rb:74:in `load'
/usr/local/lib/ruby/2.6.0/bundler/cli/exec.rb:74:in `kernel_load'
/usr/local/lib/ruby/2.6.0/bundler/cli/exec.rb:28:in `run'
/usr/local/lib/ruby/2.6.0/bundler/cli.rb:463:in `exec'
/usr/local/lib/ruby/2.6.0/bundler/vendor/thor/lib/thor/command.rb:27:in `run'
/usr/local/lib/ruby/2.6.0/bundler/vendor/thor/lib/thor/invocation.rb:126:in `invoke_command'
/usr/local/lib/ruby/2.6.0/bundler/vendor/thor/lib/thor.rb:387:in `dispatch'
/usr/local/lib/ruby/2.6.0/bundler/cli.rb:27:in `dispatch'
/usr/local/lib/ruby/2.6.0/bundler/vendor/thor/lib/thor/base.rb:466:in `start'
/usr/local/lib/ruby/2.6.0/bundler/cli.rb:18:in `start'
/usr/local/lib/ruby/gems/2.6.0/gems/bundler-1.17.2/exe/bundle:30:in `block in '
/usr/local/lib/ruby/2.6.0/bundler/friendly_errors.rb:124:in `with_friendly_errors'
/usr/local/lib/ruby/gems/2.6.0/gems/bundler-1.17.2/exe/bundle:22:in `'
/usr/local/bin/bundle:23:in `load'
/usr/local/bin/bundle:23:in `'

We think that Hound doesn't support it. Will it be possible to add support for/whitelist this particular extension?

Thank you