Merge pull request #493 from juliuscanute/dependabot/github_actions/subosito/flutter-action-2.3.0

Bump subosito/flutter-action from 1 to 2.3.0

.github/workflows/dart.yml

@@ -12,7 +12,7 @@ jobs:
       - uses: actions/setup-java@v1
         with:
           java-version: '12.x'
-      - uses: subosito/flutter-action@v1
+      - uses: subosito/flutter-action@v2.3.0
       - name: Version
         run: flutter doctor -v
       - name: Install dependencies