chore: fix pana

Author: felangel

.github/actions/dart_package/action.yaml

@@ -94,7 +94,7 @@ runs:
       working-directory: ${{ inputs.working_directory }}
       shell: ${{ inputs.shell }}
       run: |
-        dart pub global activate pana 0.22.17
+        dart pub global activate pana 0.22.21
         sudo apt-get install webp
         PANA=$(pana . --no-warning); PANA_SCORE=$(echo $PANA | sed -n "s/.*Points: \([0-9]*\)\/\([0-9]*\)./\1\/\2/p")
         echo "score: $PANA_SCORE"

packages/dart_frog_lint/lib/dart_frog_lint.dart

@@ -0,0 +1,3 @@
+/// A collection of lint rules built specifically for Dart Frog.
+/// Learn more at https://dart-frog.dev
+library;