Add a configuration option to exclude paths

[adam-26]

Is your feature request related to a problem? Please describe.
This plugin includes the node_modules folder in the search path.
Some packages are published that include CSS imports (ie:import './some.css' ) but the .css file is not included in the package, that causes this plugin to crash.

Describe the solution you'd like
Add a configuration option excludePath(s), that accepts a string | RegEx that is then used to exclude the specified paths from reading css files.

Describe alternatives you've considered
None.

Additional context
Being able to exclude paths would likely improve plugin performance.

[mrmckeb]

Hi @adam-26, the "crash" issue should have been solved by #218 (thank you). Do you think that's enough for now?

The plugin itself only tries to read CSS from node_modules if it's imported (or imported by an import).

[adam-26]

Hi @mrmckeb, thanks for fixing and merging #218 it's much appreciated. I agree that that's enough for now, thanks again.