Fix tokio dependency break

Author: Zageron

crates/head/Cargo.toml

@@ -37,7 +37,6 @@ rrr-core = { path = "../core", default-features = false }
 serde = { version = "1.0.144", optional = true, features = ["derive"] }
 strum = { version = "0.24.1", features = ["derive"] }
 winit = { version = "0.27.2", default-features = false }
-tokio = { version = "1.21.0", features = ["macros", "rt-multi-thread"] }
 
 
 [target.'cfg(not(target_arch = "wasm32"))'.dependencies]
@@ -61,3 +60,4 @@ features = ["Window", "Document", "EventListener"]
 
 [dev-dependencies]
 bytes = { version = "1.2.1", features = ["serde"] }
+tokio = { version = "1.21.0", features = ["macros", "rt-multi-thread"] }