Merge pull request #287 from rust-cli/renovate/signal-hook-0.x

chore(deps): update rust crate signal-hook to 0.4.0

Author: epage

Cargo.lock

@@ -84,4 +84,4 @@ serde_derive = "1.0.199"
 serde = "1.0.199"
 ctrlc = "3.4.4"
 crossbeam-channel = "0.5.12"
-signal-hook = "0.3.17"
+signal-hook = "0.4.0"