Enabled warning mode for Gradle unit tests

Author: merendamattia

.github/workflows/gradle-all.yml

@@ -18,4 +18,4 @@ jobs:
     - name: 'Grant execute permission for gradlew'
       run: chmod +x gradlew
     - name: 'Gradle: compile and run unit tests'
-      run: ./gradlew test
+      run: ./gradlew test --warning-mode all