Add deploy to Maven action

Needs the following secrets in your github project:
- sonatypeUsername
- sonatypePassword
- signingPrivateKey
- signingPrivateKeyPassword

Author: RobertLK

.github/workflows/publish.yml

@@ -49,10 +49,37 @@ jobs:
         name: sample-2
         path: "sample-app-2/build/outputs/apk/"
 
-  tag:
+  deploy:
     runs-on: ubuntu-latest
     needs: check
 
+    steps:
+    - uses: actions/checkout@v1
+    - name: Cache gradle dependencies
+      uses: actions/cache@v1
+      with:
+        path: ~/.gradle
+        key: ${{ runner.os }}-gradle${{ hashFiles('gradle/wrapper/gradle-wrapper.properties')}}-${{ hashFiles('gradle.properties')}}
+        restore-keys: |
+          ${{ runner.os }}-gradle${{ hashFiles('gradle/wrapper/gradle-wrapper.properties')}}-
+          ${{ runner.os }}-
+    - name: set up JDK 1.8
+      uses: actions/setup-java@v1
+      with:
+        java-version: 1.8
+
+    - name: Publish to maven
+      env:
+        sonatypeUsername: ${{ secrets.sonatypeUsername }}
+        sonatypePassword: ${{ secrets.sonatypePassword }}
+        signingKey: ${{ secrets.signingPrivateKey }}
+        signingPassword: ${{ secrets.signingPrivateKeyPassword }}
+      run: ./gradlew publishAarReleasePublicationToMavenCentralRepository closeAndReleaseRepository "-PsonatypeUsername=$sonatypeUsername" "-PsonatypePassword=$sonatypePassword" "-PinMemorySigningKey=$signingKey" "-PinMemoryKeyPassword=$signingPassword" --no-daemon
+
+  tag:
+    runs-on: ubuntu-latest
+    needs: deploy
+
     steps:
     - uses: actions/checkout@v1
     - name: Add tag
@@ -66,3 +93,4 @@ jobs:
       with:
         github_token: ${{ secrets.GITHUB_TOKEN }}
         tags: true
+