Switch to voxpupuli-rubocop

Author: bastelfreak

.github/workflows/ruby.yml

@@ -23,8 +23,6 @@ jobs:
       with:
         ruby-version: ${{ matrix.ruby }}
         bundler-cache: true
-    - run: |
-        bundle exec rspec spec --color --format documentation --order random
+    - run: bundle exec rspec spec --color --format documentation --order random
     - name: Rubocop
-      run: |
-        bundle exec rubocop -D
+      run: bundle exec rake rubocop

.gitignore

@@ -3,3 +3,5 @@
 Gemfile.lock
 *.gem
 .ruby-version
+/vendor
+/.vendor