Add publishing workflow

Signed-off-by: Takahiro Nakayama <[email protected]>

Author: civitaspo

.github/workflows/publish.yml

@@ -0,0 +1,24 @@
+name: Publish package to GitHub Packages
+on:
+  release:
+    types: [created]
+jobs:
+  publish:
+    runs-on: ubuntu-latest 
+    permissions: 
+      contents: read
+      packages: write 
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-java@v3
+        with:
+          java-version: '8'
+          distribution: 'adopt'
+      - name: Validate Gradle wrapper
+        uses: gradle/wrapper-validation-action@v1
+      - name: Publish package
+        uses: gradle/gradle-build-action@v2
+        with:
+          arguments: publish
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}