Improve compilation speed

Author: matklad

crates/syntax/Cargo.toml

@@ -25,10 +25,10 @@ serde = { version = "1.0.106", features = ["derive"] }
 stdx = { path = "../stdx", version = "0.0.0" }
 text_edit = { path = "../text_edit", version = "0.0.0" }
 parser = { path = "../parser", version = "0.0.0" }
-test_utils = { path = "../test_utils", version = "0.0.0" }
 profile = { path = "../profile", version = "0.0.0" }
 
 [dev-dependencies]
+test_utils = { path = "../test_utils" }
 walkdir = "2.3.1"
 rayon = "1"
 expect-test = "1.1"