Create release.yml

.github/workflows/release.yml

@@ -0,0 +1,17 @@
+name: Publish Flutter Plugin
+on:
+  release:
+    types: [created]
+
+jobs:
+  publishing:
+    runs-on: ubuntu-latest
+    steps:
+      - name: 'Checkout'
+        uses: actions/checkout@main # required!
+
+      - name: '>> Dart package <<'
+        uses: k-paxian/dart-package-publisher@master
+        with:
+          accessToken: ${{ secrets.OAUTH_ACCESS_TOKEN }}
+          refreshToken: ${{ secrets.OAUTH_REFRESH_TOKEN }}