Support dropping folders

[kevinleedrum]

Happy Hacktoberfest! 🎃

This PR adds the ability to drop folders, which will be parsed recursively for files.

Before: ☹️

After: 😄

[safrazik]

Thank you for the pull request. This is a very welcomed feature (that I had thought of supporting in the future). I will do some testing on my side and merge. Thanks. Happy Hacktoberfest!

[safrazik]

Hi @kevinleedrum great work. I tested it and works perfectly. My only concern is that you are using async/await, which will result in the regeneratorRuntime being added to the dist files which in turn affect the dist file size (+84KB unminified, +25KB minified) . I have avoided using some es6+ features on purpose because I was too concerned about the file size. As this is a library, I believe that we should keep a minimal footprint for consumption from any development setup.
Will you be able to update your pull request? Or I can merge and update it to plain promise based implementation before the next release.

[kevinleedrum]

Good point. I will convert it to promises.

[kevinleedrum]

@safrazik I've replaced async/await with promises, and I also replaced const and let with var to match the rest of the project.

[safrazik]

@kevinleedrum Thank you for your work.
BTW, I don't think const or let will cause any trouble, but yeah, it's good to keep things consistent. Since the library evolved by time (before being open sourced) you will see a lot of old fashioned code. It would be better to do some code refactor in the future. Thanks for helping.

[Garito]

My two cents on that:
const, let & var have different repercussions (in that case scope & performance)
const should be used for non mutable values for performance
let & var should be used to control the scope of the variable (var being less "local")

So, I would rather prefer that kind of consistence

[safrazik]

Sure. I haven't seen a better (short) explanation than this for const and let. Thanks.

[safrazik]

@kevinleedrum Support for dropping folders landed in version 1.3 Rock Wren. Thanks for your contribution.