Added publish action

Author: github-actions[bot]

.github/workflows/publish.yml

@@ -0,0 +1,42 @@
+name: Publish
+
+on:
+  workflow_dispatch:
+    inputs:
+      version:
+        description: "Release version"
+        required: true
+jobs:
+  release:
+    name: Release
+    runs-on: ubuntu-18.04
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+
+      - name: Set up Java
+        uses: actions/setup-java@v1
+        with:
+          java-version: 11
+
+      - uses: actions/cache@v2
+        with:
+          path: ~/.m2/repository
+          key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}
+          restore-keys: |
+            ${{ runner.os }}-maven-
+
+      - name: Set release version
+        run: |
+          VERSION=${{ github.event.inputs.version }}
+          ./mvnw versions:set -DnewVersion=$VERSION
+
+      - name: Build
+        run: ./mvnw --no-transfer-progress -B --file pom.xml process-resources
+
+      - name: Deploy
+        uses: peaceiris/actions-gh-pages@v3
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          publish_dir: ./target/generated-docs