feat(resolve): resolve constants on check too

[douglasduteil]

Hi @dylanmckay

Like @lukaspustina, I find this crate a holy tool that I will certainly over use ! 🙏
Here is my attempt fixing the CHECK @variable issue (#5)

NOTE: #[cfg(tes)]

It seems like there is a typo on #[cfg(test)] in src/parse.rs preventing the unit tests to run :

lit/src/parse.rs

Line 180 in 652ee63

#[cfg(tes)]

Activating it made the compiler angry so I changed the tests a bit...
I hope that it still follows the specs you have in mind (:

NOOTE: rustfmt ?

It seems like you are not using the default code formatter as I had to manually disable it to have that "minimal" PR.
Are you against the idea of using it on this project ?

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I have to thank lord @sheredom for his inspirational article that convinced me, a lvl 0 Rust-y 🦀, to take a closer look at this testing tool beauty 😏

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Fixes #5