upgrade grass

Author: syphar

Cargo.lock

@@ -133,7 +133,7 @@ gix = { version = "0.37.2", default-features = false }
 string_cache_codegen = "0.5.1"
 walkdir = "2"
 anyhow = { version = "1.0.42", features = ["backtrace"] }
-grass = { version = "0.11.0", default-features = false }
+grass = { version = "0.12.3", default-features = false }
 once_cell = { version = "1.4.0", features = ["parking_lot"] }
 syntect = { version = "5.0.0", default-features = false, features = ["parsing", "dump-create", "yaml-load", "regex-onig"] }