Update mio to version 0.8

Author: eldruin

CHANGELOG.md

@@ -4,7 +4,8 @@
 
 ### Changed
 
-- Updated nix to version `0.23`.
+- Updated `nix` to version `0.23`.
+- Updated `mio` to version `0.8`.
 
 ## [0.6.0] - 2021-09-24
 

Cargo.toml

@@ -20,7 +20,7 @@ async-tokio = ["futures", "tokio", "mio-evented"]
 [dependencies]
 futures = { version = "0.3", optional = true }
 nix = "0.23"
-mio = { version = "0.7", optional = true, features = ["os-ext"]}
+mio = { version = "0.8", optional = true, features = ["os-ext"]}
 tokio = { version = "1", optional = true, features = ["net"] }
 
 [dev-dependencies]