chore: Update publish to work with flutter instead of dart. (#36)

.github/workflows/publish.yml

@@ -1,10 +1,29 @@
+# .github/workflows/publish.yml
 name: Publish to pub.dev
 
 on:
   push:
     tags:
-      - '[0-9]+.[0-9]+.[0-9]+*'
+    - 'v[0-9]+.[0-9]+.[0-9]+*' # tag pattern on pub.dev: 'v'
 
+# Publish using custom workflow
 jobs:
   publish:
-    uses: dart-lang/setup-dart/.github/workflows/publish.yml@v1
+    permissions:
+      id-token: write # This is required for authentication using OIDC
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - name: Install Dart
+        uses: dart-lang/setup-dart@v1
+        with:
+          sdk: stable
+      - name: Install Flutter
+        uses: subosito/flutter-action@v2
+        with:
+          flutter-version: '3.3.7'
+          channel: 'stable'
+      - name: Install dependencies
+        run: flutter pub get
+      - name: Publish
+        run: flutter pub publish --force