chore: Set proper cssparser dependency constraint

Author: Stranger6667

Cargo.toml

@@ -14,5 +14,5 @@ categories = ["web-programming"]
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-cssparser = "*"
+cssparser = "0"
 kuchiki = "0.8"