chore: fix release workflow (#50)

```console
Run dart pub get
Resolving dependencies...
Because maplibre requires the Flutter SDK, version solving failed.

Flutter users should use `flutter pub` instead of `dart pub`.
Error: Process completed with exit code 1.
```

.github/FUNDING.yml

@@ -0,0 +1 @@
+custom: ["https://www.paypal.me/joschaeckert"]

.github/workflows/publish.yml

@@ -7,6 +7,17 @@ on:
 
 jobs:
   publish:
+    name: 'Publish to pub.dev'
     permissions:
-      id-token: write # Required for authentication using OIDC
-    uses: dart-lang/setup-dart/.github/workflows/publish.yml@v1
+      id-token: write # This is required for requesting the OIDC
+    runs-on: ubuntu-latest
+    if: github.repository_owner == 'josxha'
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dart-lang/setup-dart@v1
+        # --force skips the y/N confirmation
+        # --skip-validation because of "Because maplibre requires the Flutter SDK, version solving failed. Flutter users should use `flutter pub` instead of `dart pub`."
+        # see https://github.com/dart-lang/setup-dart/issues/68
+      - name: Publish to pub.dev
+        working-directory: ${{ inputs.working-directory }}
+        run: dart pub publish --force --skip-validation