fix(deps): update rust crate nix to 0.30.0 (#129)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

Cargo.lock

@@ -26,7 +26,7 @@ notify-rust = "4.11.7"
 toml = "0.9.0"
 mpris = "2.0.1"
 #clap_generate = "3.0.3"
-nix = {version = "0.29.0", features = ["signal"]}
+nix = {version = "0.30.0", features = ["signal"]}
 rust-pulsectl-fork = { version = "0.2.12", optional = true }
 human-panic = "2.0.4"
 log = "0.4.29"