Add assets and .org workflow.

.github/workflows/deploy.yml

@@ -0,0 +1,28 @@
+name: Deploy to WordPress.org
+on:
+  release:
+    types: [published]
+jobs:
+  tag:
+    name: New release
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+      - name: WordPress Plugin Deploy
+        id: deploy
+        uses: 10up/action-wordpress-plugin-deploy@stable
+        with:
+          generate-zip: true
+        env:
+          SVN_USERNAME: ${{ secrets.SVN_USERNAME }}
+          SVN_PASSWORD: ${{ secrets.SVN_PASSWORD }}
+      - name: Upload release asset
+        uses: actions/upload-release-asset@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          upload_url: ${{ github.event.release.upload_url }}
+          asset_path: ${{ steps.deploy.outputs.zip-path }}
+          asset_name: ${{ github.event.repository.name }}.zip
+          asset_content_type: application/zip