Update to nix 0.25

Author: sdroege

Cargo.toml

@@ -49,7 +49,7 @@ tempfile = "3"
 
 [target.'cfg(target_os = "linux")'.dev-dependencies]
 inotify = { version = "0.10", default-features = false }
-nix = { version = "0.24", default-features = false }
+nix = { version = "0.25", default-features = false }
 timerfd = "1"
 
 [target.'cfg(windows)'.dev-dependencies]