don't localize imported values in selectors

[jquense]

This PR adds support for using imported values as selectors. Previously if an imported value (like a class name) was used in a selector it would get replaces correctly, but then would be made :local() which ends up resulting in the classname getting hashed again later and removing the reference to the original value.

This prevents that by treating an instance of a imported key in a selector as if it was global so that it's not localized. You can also avoid this behavior by explicitly making the selector :local()

[jquense]

@evilebottnawi this is, I think, a better alternative to css-modules/postcss-modules-scope#4 and needed before webpack-contrib/css-loader#894

[codecov-io]

Codecov Report

Merging #13 into master will decrease coverage by 0.32%.
The diff coverage is 95.83%.

@@            Coverage Diff             @@
##           master      #13      +/-   ##
==========================================
- Coverage   99.63%   99.31%   -0.33%     
==========================================
  Files           2        2              
  Lines         273      291      +18     
  Branches       86       91       +5     
==========================================
+ Hits          272      289      +17     
- Misses          1        2       +1

Impacted Files	Coverage Δ
test.js	100% <ø> (ø)	⬆️
index.js	99.23% <95.83%> (-0.36%)	⬇️

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[alexander-akait]

Good job! Can you describe more verbosely what PR do for other developers. Also looks we have regression, can you look on this webpack-contrib/css-loader#906?

[alexander-akait]

hm, looks like we should release this as major version, right?

[jquense]

I would probably bump the major to be safe yeah.

[jquense]

checkin: I am done here, unless there is something you'd like me to change :)

[alexander-akait]

All god, thanks for PR

[jquense]

awesome thanks!