fix: enable used but missing stream feature on tokio

Author: mehcode

sqlx-rt/Cargo.toml

@@ -20,7 +20,7 @@ async-native-tls = { version = "0.3.3", optional = true }
 actix-rt = { version = "1.1.1", optional = true }
 actix-threadpool = { version = "0.3.2", optional = true }
 async-std = { version = "1.6.0", features = [ "unstable" ], optional = true }
-tokio = { version = "0.2.21", optional = true, features = [ "blocking", "fs", "tcp", "uds", "macros", "rt-core", "rt-threaded", "time", "dns", "io-util" ] }
+tokio = { version = "0.2.21", optional = true, features = [ "blocking", "stream", "fs", "tcp", "uds", "macros", "rt-core", "rt-threaded", "time", "dns", "io-util" ] }
 tokio-native-tls = { version = "0.1.0", optional = true }
 native-tls = "0.2.4"
 once_cell = { version = "1.4", features = ["std"], optional = true }