Add support for yaml/.js configuration files

[bcoe]

We've had a few requests for yaml and .js configuration files:

https://github.com/bcoe/c8/issues/425 https://github.com/bcoe/c8/issues/420

---

One issue with .yaml is that the available yaml parsers are massive, 10x the size of c8 itself.

.js configuration would perhaps be less unwieldy. We should look at how mocha approaches this (as I think there are potentially security pitfalls, we shouldn't just go with the naive approach).

[kf6kjg]

Parsers may be massive, but they are also already deeply embedded in the ecosystem. E.g. a lot of the dev packages a user will install already include such.

That said you could make such a parser an optional dependency. Then the user install it if the user wants to configure that way.

As to using javascript, not my preference unless the system can also accept Typescript. That has been a difficult proposition in most projects I've interacted with.

[mcknasty]

Hi @bcoe and @kf6kjg

I just put in Pull Request #436 for this feature. Need a maintainer to review before starting the workflow.

Thanks!