Bring lazy_static to the nac3core project

nac3core/Cargo.toml

@@ -10,6 +10,7 @@ crossbeam = "0.8.1"
 parking_lot = "0.11.1"
 rayon = "1.5.1"
 nac3parser = { path = "../nac3parser" }
+lazy_static = "1.4.0"
 
 [dependencies.inkwell]
 git = "https://github.com/TheDan64/inkwell.git"

nac3core/src/lib.rs

@@ -1,6 +1,9 @@
 #![warn(clippy::all)]
 #![allow(dead_code)]
 
+#[macro_use]
+extern crate lazy_static;
+
 pub mod codegen;
 pub mod symbol_resolver;
 pub mod toplevel;