Update frontend-specific files in reviewer roulette

lib/gitlab/danger/helper.rb

@@ -108,7 +108,23 @@ module Gitlab
         %r{\A(ee/)?public/} => :frontend,
         %r{\A(ee/)?spec/(javascripts|frontend)/} => :frontend,
         %r{\A(ee/)?vendor/assets/} => :frontend,
-        %r{\A(jest\.config\.js|package\.json|yarn\.lock|\.eslintrc\.yml)\z} => :frontend,
+        %r{\Ascripts/frontend/} => :frontend,
+        %r{(
+          \.babelrc |
+          \.eslintignore |
+          \.eslintrc(\.yml)? |
+          \.nvmrc |
+          \.prettierignore |
+          \.prettierrc |
+          \.scss-lint.yml |
+          \.stylelintrc |
+          babel\.config\.js |
+          jest\.config\.js |
+          karma\.config\.js |
+          webpack\.config\.js |
+          package\.json |
+          yarn\.lock
+        )\z}x => :frontend,
         %r{\A(ee/)?app/(?!assets|views)[^/]+} => :backend,
         %r{\A(ee/)?(bin|config|danger|generator_templates|lib|rubocop|scripts)/} => :backend,