Running "flutter pub get" in project_root...                       181ms
The package resolution is not fully migrated to null-safety.            
                                                                        
package:sky_engine is not opted into null safety in its pubspec.yaml:   
  ╷                                                                     
8 │   sdk: '>=1.11.0 <3.0.0'                                            
  │        ^^^^^^^^^^^^^^^^^                                            
  ╵                                                                     
                                                                        
Either downgrade your sdk constraint, or invoke dart/flutter with       
`--no-sound-null-safety`.                                               
                                                                        
To learn more about available versions of your dependencies try running 
`pub outdated --mode=null-safety`.                                      
                                                                        
See more at https://dart.dev/null-safety/migration-guide.