.github/workflows/main.yml in mocktail-0.0.1 vs .github/workflows/main.yml in mocktail-0.0.2

@@ -2,17 +2,23 @@
 
 on: [push,pull_request]
 
 jobs:
   build:
-    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        os: [ ubuntu-latest ]
+        ruby-version: [3.0.1]
+
+    runs-on: ${{ matrix.os }}
+
     steps:
     - uses: actions/checkout@v2
     - name: Set up Ruby
       uses: ruby/setup-ruby@v1
       with:
-        ruby-version: 3.0.1
+        ruby-version: ${{ matrix.ruby-version }}
     - name: Run the default task
       run: |
-        gem install bundler -v 2.2.15
+        gem install bundler
         bundle install
         bundle exec rake