Bump nix from 0.19.0 to 0.19.1 (#2033)

Bumps [nix](https://github.com/nix-rust/nix) from 0.19.0 to 0.19.1.
- [Release notes](https://github.com/nix-rust/nix/releases)
- [Changelog](https://github.com/nix-rust/nix/blob/master/CHANGELOG.md)
- [Commits](https://github.com/nix-rust/nix/compare/v0.19.0...v0.19.1)

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

polkadot/Cargo.lock

@@ -3595,13 +3595,13 @@ dependencies = [
 
 [[package]]
 name = "nix"
-version = "0.19.0"
+version = "0.19.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "85db2feff6bf70ebc3a4793191517d5f0331100a2f10f9bf93b5e5214f32b7b7"
+checksum = "b2ccba0cfe4fdf15982d1674c69b1fd80bad427d293849982668dfe454bd61f2"
 dependencies = [
  "bitflags",
  "cc",
- "cfg-if 0.1.10",
+ "cfg-if 1.0.0",
  "libc",
 ]
 
@@ -4722,7 +4722,7 @@ dependencies = [
  "assert_cmd",
  "color-eyre",
  "futures 0.3.8",
- "nix 0.19.0",
+ "nix 0.19.1",
  "parity-util-mem",
  "polkadot-cli",
  "polkadot-service",

polkadot/Cargo.toml

@@ -21,7 +21,7 @@ parity-util-mem = { version = "*", default-features = false, features = ["jemall
 
 [dev-dependencies]
 assert_cmd = "1.0.2"
-nix = "0.19.0"
+nix = "0.19.1"
 tempfile = "3.1.0"
 
 [workspace]