feat: add umi-dayjs-plugin

[iamkun]

Ref:

ant-design/antd-dayjs-webpack-plugin#47

https://github.com/ant-design/antd-dayjs-webpack-plugin

一个 umi 插件, 使用 antd-dayjs-webpack-plugin 来使用 Day.js 替换项目中的 moment .

[codecov]

Codecov Report

Merging #495 (ab92746) into master (e302a84) will decrease coverage by 3.49%.
The diff coverage is 0.00%.

❗ Current head ab92746 differs from pull request most recent head 70141d2. Consider uploading reports for the commit 70141d2 to get more accurate results

@@            Coverage Diff             @@
##           master     #495      +/-   ##
==========================================
- Coverage   50.45%   46.96%   -3.50%     
==========================================
  Files          66       67       +1     
  Lines        1631     1563      -68     
  Branches      426      436      +10     
==========================================
- Hits          823      734      -89     
- Misses        806      828      +22     
+ Partials        2        1       -1     

Impacted Files	Coverage Δ
packages/plugin-dayjs/src/index.ts	0.00% <0.00%> (ø)
packages/plugin-layout/src/component/logo.tsx	0.00% <0.00%> (-100.00%)	⬇️
packages/plugin-layout/src/layout/blankLayout.tsx	0.00% <0.00%> (-100.00%)	⬇️
...es/plugin-layout/src/component/Exception/index.tsx	0.00% <0.00%> (-84.62%)	⬇️
packages/plugin-layout/src/index.ts	0.00% <0.00%> (-62.97%)	⬇️
packages/plugin-qiankun/src/common.ts	26.41% <0.00%> (-40.86%)	⬇️
packages/plugin-locale/src/index.ts	82.35% <0.00%> (-0.08%)	⬇️
packages/plugin-request/src/request.ts	93.67% <0.00%> (-0.08%)	⬇️
packages/plugin-antd/src/index.ts	0.00% <0.00%> (ø)
packages/plugin-model/src/index.ts	0.00% <0.00%> (ø)
... and 34 more

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[afc163]

@sorrycc 看看？

[sorrycc]

antd 的功能统一放 antd 插件里吧，通过配 antd: { dayjs: {} } 开启。