Check Flutter compatibility in CI

Author: amake

.github/workflows/dart.yml

@@ -18,3 +18,11 @@ jobs:
       run: dart analyze
     - name: Run tests
       run: make test
+  check:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: amake/dart-flutter-compat@v0-pre2
+        with:
+          channel: stable
+          cache: true