cache gradle wrapper in circle ci

Author: csikb

.circleci/config.yml

@@ -5,7 +5,13 @@ jobs:
       - image: cimg/openjdk:11.0
     steps:
       - checkout
+      - restore_cache:
+          key: v1-gradle-wrapper-{{ checksum "gradle/wrapper/gradle-wrapper.properties" }}
       - run: ./gradlew
+      - save_cache:
+          paths:
+            - ~/.gradle/wrapper
+          key: v1-gradle-wrapper-{{ checksum "gradle/wrapper/gradle-wrapper.properties" }}
       - run: ./gradlew check --parallel
       - store_test_results:
           path: web/build/test-results