Karma webpack color option

[spicalous]

I'm submitting a feature request

It would improve consistency of configs if webpack's color config inherits Karma's color config

• What is the motivation / use case for changing the behavior?

Would provide more consistency, similar to the same way that webpack currently uses Karma's singleRun config to determine the watch config:
https://github.com/webpack-contrib/karma-webpack/blob/master/src/karma-webpack.js#L42

Proposed behaviour

As a suggestion, the value could be determined as follows: Taking the next item in the list if the previous one is not defined:

• webpack's color config value
• karma's color config value
• webpack's default color value (same as it is now)

Next step

I could contribute this and open a PR in the near future if the majority of the maintainers agree?

Thanks in advance!

Docs for reference

Webpack stats color docs: https://webpack.js.org/configuration/stats/?_sm_au_=iVVJFnC5DW5NQLFF#stats
Karma docs for color http://karma-runner.github.io/2.0/config/configuration-file.html

[michael-ciniawsky]

Feel free to send a PR :)