要更新所有分支，命令可以简写为：
image.png
$ git fetch
git branch -a
git status
git diff
git add .
git merge master
git commit -m 'ss'
git pull origin v1.2
git push origin v1.2
git pull origin 2.6.4.2 huangzurong
clear
php artisan config:cache (换数据库记得先执行一下)
php artisan migrate
