Add setup step

Author: AndrewX192

.github/workflows/test.yml

@@ -10,5 +10,7 @@ jobs:
         with:
            java-version: '8'
            distribution: 'temurin'
+      - name: Setup Gradle
+        uses: gradle/gradle-build-action@v2
       - name: run tests
         run: ./gradlew test --no-daemon