Licensing issue: `snailquote`

[JarvisCraft]

Hi there, while researching this repository I've discovered an unfortunate licensing issue: snailquote which is used by this project is licensed under GPL v3 which, strictly speaking, is not compatible with MIT (which is used by this project) as it requires all derivations to also be under GPL v3.

I suggest that this dependency is replaced with something similar with more permissive license (e.g. MIT or Apache 2.0).

---

By the way, thanks for the amazing project! It is a great inspiration and an example while working on my own language using similar crates.

[linkdd]

Hi,

Thanks for pointing it out, I'm not currently working on this project, so I won't have time to make the change. I might implement a similar crate in the future licensed with MIT to replace it, or just switch Letlang to GPL. I don't know yet.