add quality_checks_pass to gate pull request merge (#54)

Author: lukevalenty

.github/workflows/unit_tests.yml

@@ -135,6 +135,12 @@ jobs:
         working-directory: ${{github.workspace}}/build
         run: ctest -C ${{env.BUILD_TYPE}}
 
+  quality_checks_pass:
+    runs-on: ubuntu-latest
+    needs: build_and_test
+    steps:
+      - name: Say Hello
+        run: echo "Hello!"
 
   build_single_header:
     runs-on: ubuntu-latest