Replace lazy_static with std::sync::LazyLock in grammar.rs

Signed-off-by: Nicola Bonelli <[email protected]>

Author: awgn

Cargo.lock

@@ -11,7 +11,6 @@ http.workspace = true
 thiserror.workspace = true
 
 criterion = "0.5.1"
-lazy_static = "1.5.0"
 ptrie = "0.7.2"
 smol_str = { version = "0.3.2", features = ["serde"] }
 chrono = "0.4.40"