Bump clang-sys from 1.4.0 to 1.6.0 (#525)

Bumps [clang-sys](https://github.com/KyleMayes/clang-sys) from 1.4.0 to 1.6.0.
- [Release notes](https://github.com/KyleMayes/clang-sys/releases)
- [Changelog](https://github.com/KyleMayes/clang-sys/blob/master/CHANGELOG.md)
- [Commits](https://github.com/KyleMayes/clang-sys/commits)

---
updated-dependencies:
- dependency-name: clang-sys
  dependency-type: indirect
  update-type: version-update:semver-minor
...

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

Cargo.lock

@@ -259,9 +259,9 @@ dependencies = [
 
 [[package]]
 name = "clang-sys"
-version = "1.4.0"
+version = "1.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fa2e27ae6ab525c3d369ded447057bca5438d86dc3a68f6faafb8269ba82ebf3"
+checksum = "77ed9a53e5d4d9c573ae844bfac6872b159cb1d1585a83b29e7a64b7eef7332a"
 dependencies = [
  "glob",
  "libc",