Merge pull request #13 from SkyPierIO/renovate/nix-0.x

Update Rust crate nix to 0.31

Author: smolgroot

Cargo.lock

@@ -71,7 +71,7 @@ tokio-cron-scheduler = "0.10"
 # Signal handling
 signal-hook = "0.3"
 signal-hook-tokio = { version = "0.3", features = ["futures-v0_3"] }
-nix = { version = "0.27", features = ["signal"] }
+nix = { version = "0.31", features = ["signal"] }
 
 [dev-dependencies]
 tempfile = "3.8"