Simplify GitHub Actions configuration and update .gitignore

Reduced the number of versions being tested in GitHub Actions and modified the test command to re-run tasks on failure. Removed the 'Install Dependencies' step since dependencies can now be managed by the Gradle wrapper scripts. Additionally, included the 'build' directory in the .gitignore file.

.github/workflows/main.yml

@@ -34,4 +34,4 @@ jobs:
         uses: gradle/gradle-build-action@v2
 
       - name: Run tests
-        run: ./gradlew test --rerun-tasks
+        run: ./gradlew test --rerun-tasks --info