Merge pull request #16 from DFE-Digital/add-test-matrix-in-ci

Add test matrix in CI

.github/workflows/tests.yml

@@ -1,22 +1,26 @@
 name: Ruby
-
 on:
   - pull_request
-
 jobs:
-  test:
-
+  rspec:
+    strategy:
+      fail-fast: false
+      matrix:
+        ruby: ['2.7.6', '3.0.4', '3.1.2']
     runs-on: ubuntu-latest
-
     steps:
     - uses: actions/checkout@v2
+
     - name: Set up Ruby
       uses: ruby/setup-ruby@v1
       with:
-        ruby-version: 2.7
+        ruby-version: ${{ matrix.ruby }}
+
     - name: Install dependencies
       run: bundle install --jobs 4 --retry 3
+
     - name: Run linter
       run: bundle exec rubocop .
+
     - name: Run tests
       run: bundle exec rake