flutter更新 Your local changes to

Flutter升级更新的时候报错Your local changes to the following files would be overwritten by merge....

Please commit your changes or stash them before you merge

解决办法   打开终端

1. $ cd /Users/用户名/FlutterSDK/flutter 

2.$  git status

3.$ git branch

4.$ git reset --hard HEAD

5.$ git pull

6 $ flutter upgrade