Make criterion a benchmarking only dependency

Author: faern

Cargo.toml

@@ -33,10 +33,14 @@ async = []
 loom = { version = "0.7.2", features = ["futures"], optional = true }
 
 [dev-dependencies]
-criterion = "0.5.1"
 tokio = { version = "1", features = ["rt", "rt-multi-thread", "macros", "time"] }
 async-std = { version = "1", features = ["attributes"] }
 
+# Benchmarking only dependencies
+[target.'cfg(not(test))'.dev-dependencies]
+criterion = "0.5.1"
+
+
 [lints.rust]
 unexpected_cfgs = { level = "deny", check-cfg = ['cfg(oneshot_loom)', 'cfg(oneshot_test_delay)'] }