Apply cache to github workflow

.github/workflows/gradle.yml

@@ -22,6 +22,16 @@ jobs:
         java-version: 1.8
     - name: Clean
       run: yes | rm -rf ./arclight-coremod/build/libs
+    - name: Cache Gradle User Files
+        uses: actions/cache@v1
+        with:
+          path: ~/.gradle
+          key: ${{ runner.os }}-gradle-user-home
+    - name: Cache Gradle Files
+        uses: actions/cache@v1
+        with:
+          path: ./.gradle
+          key: ${{ runner.os }}-gradle-file
     - name: Grant execute permission for gradlew
       run: chmod +x gradlew
     - name: Build with Gradle

appveyor.yml

@@ -6,7 +6,7 @@ cache:
   - ./.gradle
 build_script:
   - cmd: |
-      del /S /Q arclight-coremod\build\libs
+      IF EXIST arclight-coremod\build\libs ( del /S /Q arclight-coremod\build\libs )
       gradlew build --no-daemon -i
 test: off
 artifacts: