Add checkstyle report action

.github/workflows/test.yml

@@ -19,6 +19,11 @@ jobs:
       - uses: actions/checkout@v2
       - uses: gradle/wrapper-validation-action@v1
       - run: gradle build check -x test --stacktrace --warning-mode fail
+      - uses: Juuxel/publish-checkstyle-report@v1
+        if: ${{ failure() }}
+        with:
+          reports: |
+            build/reports/checkstyle/*.xml
 
   # This job is used to feed the test matrix of next job to allow the tests to run in parallel
   prepare_test_matrix: