add github release action

Author: iamazy

.github/workflows/release.yml

@@ -0,0 +1,34 @@
+name: deploy
+
+on:
+  workflow_dispatch:
+  release:
+    types: [published]
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up JDK 1.8
+        uses: actions/setup-java@v1
+        with:
+          java-version: 1.8
+
+      - name: Release
+        uses: softprops/action-gh-release@v1
+        if: startsWith(github.ref, 'refs/tags/')
+        with:
+          name: Elasticsearch v${{ github.ref_name }} Sql Plugin
+          prerelease: true
+          token: ${{ secrets.GITHUB_TOKEN }}
+          generate_release_notes: true
+          body:
+            '
+            ```
+            1.  parse sql into elasticsearch dsl
+            2.  query dataset with sql
+            ```
+            '
+          files: |
+            isql-plugin/target/elasticsearch-sql-plugin.zip