main.dart: do not run format for test

Author: Sergey Khomushin

.github/workflows/ci.yml

@@ -33,7 +33,7 @@ jobs:
         run: flutter pub get
 
       - name: Verify formatting
-        run: dart format --output=none --set-exit-if-changed .
+        run: dart format --output=none --set-exit-if-changed lib/ example/
 
       - name: Analyze project source
         run: flutter analyze --fatal-infos