Bump casey from 0.3.3 to 0.4.0 (#2619)

Bumps [casey](https://github.com/jordy25519/casey) from 0.3.3 to 0.4.0.
- [Release notes](https://github.com/jordy25519/casey/releases)
- [Changelog](https://github.com/jordy25519/casey/blob/master/CHANGELOG.md)
- [Commits](jordy25519/casey@0.3.3...0.4.0)

---
updated-dependencies:
- dependency-name: casey
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

xcm/xcm-emulator/Cargo.toml

@@ -9,7 +9,7 @@ edition = "2021"
 codec = { package = "parity-scale-codec", version = "3.0.0" }
 paste = "1.0.5"
 quote = "1.0.23"
-casey = "0.3.3"
+casey = "0.4.0"
 log = { version = "0.4.17", default-features = false }
 
 frame-support = { git = "https://github.com/paritytech/substrate", branch = "master" }