Bump heck from 0.4.0 to 0.4.1 (#815)

Bumps [heck](https://github.com/withoutboats/heck) from 0.4.0 to 0.4.1.
- [Release notes](https://github.com/withoutboats/heck/releases)
- [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-patch
...

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

Cargo.lock

@@ -1266,9 +1266,9 @@ dependencies = [
 
 [[package]]
 name = "heck"
-version = "0.4.0"
+version = "0.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2540771e65fc8cb83cd6e8a237f70c319bd5c29f78ed1084ba5d50eeac86f7f9"
+checksum = "95505c38b4572b2d910cecb0281560f54b440a19336cbbcb27bf6ce6adc6f5a8"
 
 [[package]]
 name = "hermit-abi"

codegen/Cargo.toml

@@ -15,7 +15,7 @@ description = "Generate an API for interacting with a substrate node from FRAME
 codec = { package = "parity-scale-codec", version = "3.0.0", default-features = false, features = ["derive", "full"] }
 darling = "0.14.0"
 frame-metadata = "15.0.0"
-heck = "0.4.0"
+heck = "0.4.1"
 proc-macro2 = "1.0.24"
 proc-macro-error = "1.0.4"
 quote = "1.0.8"