chore: upgrade async-io to v2.4.1 (transact-rs#3911)

* chore: upgrade async-io to v2.4

* refactor: replace `get_mut()` with `get_ref()` in Socket impls

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Co-authored-by: zebrapurring <>

Author: zebrapurring

Cargo.lock

@@ -62,7 +62,7 @@ ipnetwork = { workspace = true, optional = true }
 mac_address = { workspace = true, optional = true }
 uuid = { workspace = true, optional = true }
 
-async-io = { version = "1.9.0", optional = true }
+async-io = { version = "2.4.1", optional = true }
 base64 = { version = "0.22.0", default-features = false, features = ["std"] }
 bytes = "1.1.0"
 chrono = { version = "0.4.34", default-features = false, features = ["clock"], optional = true }