Add socket2 feature "all"

Author: jayvdb

Cargo.toml

@@ -24,7 +24,7 @@ http = "1.0"
 http-body = "1.0.0"
 bytes = "1"
 pin-project-lite = "0.2.4"
-socket2 = { version = "0.5", optional = true }
+socket2 = { version = "0.5", optional = true, features = ["all"] }
 tracing = { version = "0.1", default-features = false, features = ["std"] }
 tokio = { version = "1", optional = true, features = ["net", "rt", "time"] }
 tower-service = "0.3"