Feature/generate scoped name from config file

[tomrule007]

Add support for customizing generated class names with generateScopeName property in jesttransformcss.config.js as discussion in Issue #6

// example jesttransformcss.config.js
module.exports = {
  modules: (filename) => filename.endsWith('.module.css'),
  generateScopedName: "[folder]_[name]_[local]"
};

Also updated readme with instructions to use the new property and a link to all available placeholder tokens. Though I noted not all of them seem to be working, could be a new/older version issue.

[tomrule007]

It appears to be working on my end, though i will say testing a local copy of a package was a pain in the ass. I should have just spend time adding some tests to the package instead of relying on linking the local copy to my project.

I ended up using yalc to facilitate the local package linking but it still required me to re-run npm install after every change.

[dferber90]

Thanks, this is neat!

[dferber90]

I ended up using yalc to facilitate the local package linking but it still required me to re-run npm install after every change.

I think I started editing straight inside node_modules back then and only moved the changes to the real repo once I got it working as expected. But I can't quite remember as it's been a long time. Maybe it's a useful tip for the future.

Thanks for the feature! I'll release it right away.