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.lock

@@ -203,7 +203,6 @@ name = "sybil"
 version = "0.1.0"
 dependencies = [
  "gc",
- "lazy_static",
  "regex",
  "structopt",
  "thiserror",

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"] }

src/syn/lexer.rs

@@ -1,10 +1,9 @@
 use crate::syn::{error::*, span::*, token::*};
-use lazy_static::lazy_static;
 use regex::{Regex, RegexBuilder};
 use std::rc::Rc;
 
-lazy_static! {
-    static ref LEX_PAT: Regex = RegexBuilder::new(
+thread_local! {
+    static LEX_PAT: Regex = RegexBuilder::new(
         r#"^(
             (?P<float>[-+]?[0-9]+\.[0-9]+([eE][+\-][0-9]+)?)
         |   (?P<int>[-+]?[0-9]+)
@@ -88,7 +87,8 @@ impl<'t> Lexer<'t> {
             return Ok(None);
         }
 
-        if let Some(cap) = LEX_PAT.captures(&self.text[self.start.byte..]) {
+        LEX_PAT.with(|lex| {
+            if let Some(cap) = lex.captures(&self.text[self.start.byte..]) {
                 self.end = self.end.next_str(cap.get(0).unwrap().as_str());
                 let sp_token = if let Some(_) = cap.name("assign") {
                     self.make_token(Token::Assign)
@@ -121,6 +121,7 @@ impl<'t> Lexer<'t> {
                     got: expected_got_char(self.curr().unwrap()),
                 })
             }
+        })
     }
 }