Add format task

.github/workflows/ci.yaml

@@ -47,7 +47,7 @@ jobs:
           python3 find_dart_files.py
           flutter pub get
           flutter analyze
-          flutter format --output=none --set-exit-if-changed .
+          dart format --output=none --set-exit-if-changed .
 
       - name: Install Python
         uses: actions/setup-python@v4

tasks.py

@@ -37,3 +37,8 @@ def ios(c):
 def android(c):
     """Build Android app in release configuration."""
     c.run("flutter build appbundle --release --no-tree-shake-icons")
+
+@task
+def format(c):
+    """Format Dart code."""
+    c.run("dart format --output=none")