Added a feature to preserve or not the original code

[aletorrado]

Hi, I added a preserve parameter that defaults to true, consistent with how other common postcss plugins handles this matter (more on this here).

Thanks!

[ai]

Let's use a different name for parameter. classOnly or something like this, to highlight that it is another mode.

[aletorrado]

Sure. I used onlySelectors as not just classes may be used, but any other selector would work.

[ai]

You need to add more tests to keep 100% lines coverage.

And let’s name option as removeMedia.

[aletorrado]

Sure. I've just added those.

[ai]

Thanks. Released in 1.3.0.