Add automatic snapshot deploy

Author: headius

.github/workflows/ci.yml

@@ -28,3 +28,28 @@ jobs:
         cache: 'maven'
     - name: Run tests
       run: mvn test --file pom.xml
+
+
+  snapshot:
+
+    needs: test
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: checkout
+        uses: actions/checkout@v3
+      - name: set up Java
+        uses: actions/setup-java@v2
+        with:
+          distribution: 'zulu'
+          java-version: ${{ inputs.javaLevel }}
+          server-id: central
+          server-username: MAVEN_USERNAME
+          server-password: MAVEN_PASSWORD
+      - name: Publish package
+        run: mvn -B deploy
+        env:
+          MAVEN_USERNAME: ${{ secrets.MAVEN_USERNAME }}
+          MAVEN_PASSWORD: ${{ secrets.MAVEN_PASSWORD }}
+        if: ${{ github.ref == 'refs/heads/master' && github.repository == 'jruby/jcodings' }}