Use single quotes instead of double quotes

[nilsreichardt]

My pubspec.yaml looks something like this:

name: my_package
description: A new Flutter project.
publish_to: 'none'
version: 0.0.1+1

environment:
  sdk: ">=2.16.2 <3.0.0"

dependencies:
  logger: ^1.1.0

dev_dependencies:
  flutter_test:
    sdk: flutter

When I'm now adding a new package, the extension will replace the publish_to: 'none' with publish_to: "none".

name: my_package
description: A new Flutter project.
- publish_to: 'none'
+ publish_to: "none"
version: 0.0.1+1

environment:
  sdk: ">=2.16.2 <3.0.0"

dependencies:
  logger: ^1.1.0

dev_dependencies:
  flutter_test:
    sdk: flutter

When running flutter create my_package, Flutter uses single quotes for the publish_to (in feature also for the dartSdkVersionBounds: flutter/flutter#101270).

Would it be possible to use single quotes instead of double quotes?