Update gradle.yml

Author: Andre601

.github/workflows/gradle.yml

@@ -0,0 +1,24 @@
+name: Java CI
+
+on:
+  release:
+    branches:
+    - master
+    
+
+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
+      env:
+        bintrayUser: ${{ secrets.bintrayUsername }}
+        bintrayApiKey: ${{ secrets.bintrayApiKey }}
+      run: ./gradlew bintrayUpload