Add ability to attach the hook to additional extensions

[sapegin]

I use CSS Modules with Sass and I need this functionality to test components with CSS modules.

var hook = require('css-modules-require-hook');

hook({
  extension: ['.scss']
});

[mightyaleksey]

Hi, thank you for your interest! And for the pr ofc :)

I think it will be better to make an array, so the user will be able to set up multiple extensions.

[sapegin]

Good idea, I’ll update the PR.

[mightyaleksey]

Do you mind to change the options' name to extensions?

[sapegin]

Sure. I used the word “extra” to emphasize that it will not disable hooking of the default .css extension.

[mightyaleksey]

yeah, I got it :)

I decided to add another opportunity for preprocessing styles. So you'll be able to provide a custom function through the preprocessCss option. I suppose it will be useful for you.

I will publish the new version when you will finish your pr. If you will need any help - tell me :)

[sapegin]

Done.

[mightyaleksey]

:+1:

[mightyaleksey]

Published - v1.0.6

[sapegin]

Cool, thanks!

:shipit: