Implement GitHub packages.

Author: Andre601

.github/workflows/gradle.yml

@@ -5,21 +5,19 @@ on:
     types: [published]
     branches:
     - master
-    
 
 jobs:
-  build:
-
+  publish:
     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
+    - name: Build and publish
       env:
         bintrayUser: ${{ secrets.bintrayUsername }}
         bintrayApiKey: ${{ secrets.bintrayApiKey }}
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
       run: ./gradlew bintrayUpload