Remove bool literals

I think they show up as words
diff --git a/src/lib.rs b/src/lib.rs
index f504069..c28e09a 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -190,7 +190,7 @@
 tys! {
     u8, u16, u32, u64, usize,
     i8, i16, i32, i64, isize,
-    f32, f64, char, &'a str, bool,
+    f32, f64, char, &'a str,
 }
 
 pub struct TokenIter(imp::TokenIter);