no longer depend on unstable

Author: jbr

Cargo.toml

@@ -14,7 +14,7 @@ edition = "2018"
 [dependencies]
 httparse = "1.3.3"
 async-std = { version = "1.6.0", features = ["unstable"] }
-http-types = { version = "2.0.0", features = ["unstable"] }
+http-types = "2.0.0"
 byte-pool = "0.2.1"
 lazy_static = "1.4.0"
 futures-core = "0.3.1"