enable sync feature

Author: TimeToogo

tunshell-server/Cargo.toml

@@ -6,7 +6,7 @@ edition = "2018"
 
 [dependencies]
 tunshell-shared = { path = "../tunshell-shared" }
-tokio = { version = "0.2.21", features=["rt-threaded", "blocking", "time", "io-util", "tcp", "udp", "macros"] }
+tokio = { version = "0.2.21", features=["rt-threaded", "blocking", "time", "io-util", "tcp", "udp", "macros", "sync"] }
 tokio-util = { version = "0.3.1", features=["compat"] }
 tokio-rustls = { version = "0.14.0", features=["dangerous_configuration"] }
 futures = "0.3.5"