配置自动发布

+# .github/workflows/publish.yml
+name: Publish to pub.dev
+
+on:
+  push:
+    tags:
+      # must align with the tag-pattern configured on pub.dev, often just replace
+      #  with [0-9]+.[0-9]+.[0-9]+*
+      - 'v[0-9]+.[0-9]+.[0-9]+*' # tag-pattern on pub.dev: 'v'
+    # If you prefer tags like '1.2.3', without the 'v' prefix, then use:
+    # - '[0-9]+.[0-9]+.[0-9]+*' # tag-pattern on pub.dev: ''
+    # If your repository contains multiple packages consider a pattern like:
+    # - 'my_package_name-v[0-9]+.[0-9]+.[0-9]+*'
+
+# Publish using the reusable workflow from dart-lang.
+jobs:
+  publish:
+    uses: dart-lang/setup-dart/.github/workflows/publish.yml@v1
+    # with:
+    #   working-directory: path/to/package/within/repository