.github/workflows/ruby.yml in attr-gather-1.2.0 vs .github/workflows/ruby.yml in attr-gather-1.2.1

@@ -2,9 +2,12 @@
 name: Build + Test + Lint
 on: [push]
 jobs:
   build-test-lint:
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        ruby: ["2.4.x", "2.5.x", "2.6.x", "2.7.x"]
     steps:
       - uses: actions/checkout@v1
       - name: Set up Ruby 2.6
         uses: actions/setup-ruby@v1
         with: