Tighten unix_socket versions

The socket_timeout feature was introduced in 0.4.1

Author: sfackler

Cargo.toml

@@ -35,7 +35,7 @@ openssl = { version = ">= 0.6.4, < 0.8", optional = true }
 serde = { version = "0.3", optional = true } # Delete for 0.11
 serde_json = { version = "0.6", optional = true }
 time = { version = "0.1.14", optional = true }
-unix_socket = { version = ">= 0.3, < 0.5", optional = true, features = ["socket_timeout"] }
+unix_socket = { version = "0.4.1", optional = true, features = ["socket_timeout"] }
 uuid = { version = "0.1", optional = true }
 security-framework = { version = "0.1.1", optional = true }