Update clang requirement from ==17.* to ==19.*

Updates the requirements on [clang](https://github.com/llvm/llvm-project) to permit the latest version.
- [Release notes](https://github.com/llvm/llvm-project/releases)
- [Commits](llvm/llvm-project@llvmorg-17.0.0-rc1...llvmorg-19.1.7)

---
updated-dependencies:
- dependency-name: clang
  dependency-type: direct:development
...

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

Author: dependabot[bot]

requirements-dev.txt

@@ -1,6 +1,6 @@
 black
 build
-clang == 17.*
+clang == 19.*
 cython == 3.*
 inflection == 0.5.*
 setuptools