flutter vscode创建objc工程

通过vscode创建flutter工程时，默认创建的是swift项目工程，如果想要修改，可以通过vscode设置默认创建语言

1. Open vscode settings. Under User Settings, click on Extensions.
2. Open Dart & Flutter
3. Scroll down till you see Flutter Create Android Language to change it to kotlin and Flutter Create IOSLanguage to change it to swift

参考地址：https://stackoverflow.com/a/56161642