Update clang-sys requirement from 0.29 to 1.0

Updates the requirements on [clang-sys](https://github.com/KyleMayes/clang-sys) to permit the latest version.
- [Release notes](https://github.com/KyleMayes/clang-sys/releases)
- [Changelog](https://github.com/KyleMayes/clang-sys/blob/v0.29.4/CHANGELOG.md)
- [Commits](KyleMayes/clang-sys@v0.29.0...v0.29.4)

Signed-off-by: dependabot-preview[bot] <[email protected]>

Author: dependabot-preview[bot]

binding-generator/Cargo.toml

@@ -11,7 +11,7 @@ edition = "2018"
 
 [dependencies]
 clang = {version = "0.24", features = ["clang_6_0"]}
-clang-sys = {version = "0.29", features = ["clang_6_0"]}
+clang-sys = {version = "1.0", features = ["clang_6_0"]}
 dunce = "1.0"
 maplit = "1.0"
 once_cell = "1.0"