ci.yml in muffin_man-1.5.2

- old
+ new

@@ -28,5 +28,9 @@
           ruby-version: ${{ matrix.ruby-version }}
       - name: Install dependencies
         run: bundle install
       - name: Run RSpec
         run: bundle exec rspec
+      - name: Run Rubocop
+        run: bundle exec rubocop
+
+