Fix rubocop
Two issues:
- In the CI, rubocop checks different things than locally. That's maybe due to a different version?
- Ran locally I now get this error:
> bundle exec rubocop
vendor/ruby/2.5.0/gems/simplecov-html-0.10.2/.rubocop.yml: Style/AccessModifierIndentation has the wrong namespace - should be Layout
vendor/ruby/2.5.0/gems/simplecov-html-0.10.2/.rubocop.yml: Style/FileName has the wrong namespace - should be Naming
vendor/ruby/2.5.0/gems/simplecov-html-0.10.2/.rubocop.yml: Style/SpaceInsideHashLiteralBraces has the wrong namespace - should be Layout
Error: The `Style/TrailingCommaInLiteral` cop no longer exists. Please use `Style/TrailingCommaInArrayLiteral` and/or `Style/TrailingCommaInHashLiteral` instead.
(obsolete configuration found in vendor/ruby/2.5.0/gems/simplecov-html-0.10.2/.rubocop.yml, please update it)