fix focus events subscriptions

packages/tui/Cargo.toml

@@ -31,6 +31,7 @@ rustc-hash = "1.1.0"
 anymap = "1.0.0-beta.2"
 futures-channel = "0.3.25"
 shipyard = { version = "0.6.2", features = ["proc", "std"], default-features = false }
+once_cell = "1.17.1"
 
 [dev-dependencies]
 dioxus = { path = "../dioxus" }