Fix: disable exract comments

[justquanyin]

Checklist

• [x ] npm test passes
• [ x] tests are included
• [ x] documentation is changed or added
• [ x] commit message follows commit guidelines

Affected plugin(s)

beidou-webpack

Description of change

Disable extract comment by default

#148

[codecov-io]

Codecov Report

Merging #149 into master will increase coverage by 0.51%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #149      +/-   ##
==========================================
+ Coverage   92.34%   92.86%   +0.51%     
==========================================
  Files          86       86              
  Lines        1542     1542              
==========================================
+ Hits         1424     1432       +8     
+ Misses        118      110       -8

Impacted Files	Coverage Δ
...s/beidou-webpack/config/webpack/webpack.browser.js	100% <ø> (ø)	⬆️
packages/beidou-view-rax/lib/rax-view.js	100% <0%> (+23.07%)	⬆️
packages/beidou-view-rax/app/extend/helper.js	100% <0%> (+33.33%)	⬆️
...beidou-view-rax/app/view-middlewares/rax-render.js	100% <0%> (+57.14%)	⬆️

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