Bump heck from 0.4.1 to 0.5.0

Bumps [heck](https://github.com/withoutboats/heck) from 0.4.1 to 0.5.0.
- [Changelog](https://github.com/withoutboats/heck/blob/master/CHANGELOG.md)
- [Commits](https://github.com/withoutboats/heck/commits)

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

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

Author: dependabot[bot]

Cargo.lock

@@ -8,7 +8,7 @@ repository = "https://github.com/oxidecomputer/typify"
 readme = "../README.md"
 
 [dependencies]
-heck = "0.4.1"
+heck = "0.5.0"
 log = "0.4.21"
 proc-macro2 = "1.0.79"
 quote = "1.0.35"