add `lib/**/style/*` as sideEffects

[whtsky]

First of all, thank you for your contribution! :-)

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• Make sure that you propose PR to right branch: bugfix for master, feature for latest active branch feature-x.x.
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if isBugFix :

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fix #10190

[ant-design-bot]

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[codecov]

Codecov Report

Merging #10217 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master   #10217   +/-   ##
=======================================
  Coverage   86.34%   86.34%           
=======================================
  Files         197      197           
  Lines        4745     4745           
  Branches     1324     1324           
=======================================
  Hits         4097     4097           
  Misses        645      645           
  Partials        3        3

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[Kingwl]

it's very helpful to me!

[mcdyzg]

@yutingzhao1991 babel-plugin-import 改为

['import', { libraryName: 'antd', libraryDirectory: 'es', style: true }]

确实能解决，3.4.4还会不会改了这个问题？
还是说以后都指定libraryDirectory: 'es'了。

[yesmeck]

@mcdyzg 会改，不过 webpack 3 以上推荐用 es 目录，可以有 tree shaking.

[mcdyzg]

@yesmeck 已经使用babel-plugin-import按需加载单独组件了，换成libraryDirectory: 'es'还会再对子组件tree-shaking一次吗？

[yesmeck]

会