Add check for breaking BC (#55)

Author: Nyholm

.github/workflows/static-code-analysis.yml

@@ -20,3 +20,14 @@ jobs:
         uses: docker://jakzal/phpqa:php7.3-alpine
         with:
             args: php-cs-fixer fix --dry-run --diff-format udiff -vvv
+
+  roave-bc-check:
+    name: Roave BC Check
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+
+      - name: Roave BC Check
+        uses: docker://nyholm/roave-bc-check-ga