scss-flex/.browserslistrc

flexbox，移动端 flex 布局神器，兼容微信，UC，webview 等移动端主流浏览器

ie >= 7
ie_mob >= 10
ff >= 26
chrome >= 20
safari >= 6
opera >= 12
Firefox >= 24
Explorer >= 8
ios >= 5
android >= 2.3
bb >= 10
> 1%
last 2 versions
not ie <= 8
ie 11