update broadcastor to 1.0.0 (#681)

Author: k-nasa

Diff for: Cargo.toml

@@ -51,7 +51,7 @@ std = [
 [dependencies]
 async-attributes = { version = "1.1.1", optional = true }
 async-task = { version = "1.2.1", optional = true }
-broadcaster = { version = "0.2.6", optional = true, default-features = false, features = ["default-channels"] }
+broadcaster = { version = "1.0.0", optional = true }
 crossbeam-channel = { version = "0.4.0", optional = true }
 crossbeam-deque = { version = "0.7.2", optional = true }
 crossbeam-utils = { version = "0.7.0", optional = true }