flutter upgrade
flutter --version ╔════════════════════════════════════════════════════════════════════════════╗ ║ A new version of Flutter is available! ║ ║ ║ ║ To update to the latest version, run "flutter upgrade". ║ ╚════════════════════════════════════════════════════════════════════════════╝ Flutter 1.22.0-2.0.pre.102 • channel master • https://github.com/flutter/flutter.git Framework • revision 57b6952471 (4 months ago) • 2020-08-27 16:48:05 -0700 Engine • revision cdf77cac6b Tools • Dart 2.10.0 (build 2.10.0-67.0.dev)