Restore the dev-dependency

Cargo.lock

@@ -6535,6 +6535,7 @@ dependencies = [
  "async-mutex",
  "async-trait",
  "bincode",
+ "crossbeam-channel",
  "enum_dispatch",
  "futures 0.3.24",
  "futures-util",

tpu-client/Cargo.toml

@@ -39,6 +39,7 @@ thiserror = "1.0"
 tokio = { version = "1", features = ["full"] }
 
 [dev-dependencies]
+crossbeam-channel = "0.5"
 rand_chacha = "0.2.2"
 solana-logger = { path = "../logger", version = "=1.15.0" }
 solana-perf = { path = "../perf", version = "=1.15.0" }