Require the latest tokio version

Cargo.toml

@@ -37,7 +37,7 @@ libsodium-sys-stable = "1.19.22"
 log = { version = "0.4.17", features = ["std", "release_max_level_debug"] }
 mimalloc = { version = "0.1.29", default-features = false }
 socket2 = "0.4.4"
-parking_lot = "0.12.0"
+parking_lot = "0.12.1"
 privdrop = "0.5.2"
 rand = "0.8.5"
 rustc-hash = "1.1.0"
@@ -45,7 +45,7 @@ serde = "1.0.137"
 serde_derive = "1.0.137"
 serde-big-array = "0.4.1"
 siphasher = "0.3.10"
-tokio = { version = "1.18.2", features = [
+tokio = { version = "1.19.2", features = [
   "net",
   "io-std",
   "io-util",