Remove lazy_static dependency

I just learned about thread local storage, so we really don't
lazy_static for anything anymore - it was only being used for the lexer
regex.

Signed-off-by: Alek Ratzloff <alekratz@gmail.com>

Cargo.toml

@@ -9,5 +9,4 @@ edition = "2021"
 thiserror = "1.0"
 structopt = "0.3"
 regex = "1.5"
-lazy_static = "1.4"
 gc = { version = "0.4", features = ["derive"] }