Update gradle.yml

.github/workflows/gradle.yml

@@ -0,0 +1,24 @@
+name: Java CI
+
+on: [push]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v1
+    - name: Set up JDK 1.8
+      uses: actions/setup-java@v1
+      with:
+        java-version: 1.8
+    - name: Build with Gradle
+      run: ./gradlew jar
+    - name: Release
+        uses: softprops/action-gh-release@v1
+        if: startsWith(github.ref, 'refs/tags/')
+        with:
+          files: ./build/libs/RockTheVotePlugin.jar
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}