Replace deprecated classifier with licence expression (PEP 639) (#110)

* Replace deprecated classifier with licence expression (PEP 639)

* Update pyproject.toml

Author: shenxianpeng

pyproject.toml

@@ -7,7 +7,7 @@ name = "clang_tools"
 description = "Install clang-tools (clang-format, clang-tidy, clang-query, clang-apply-replacements) with pip"
 readme = "README.rst"
 keywords = ["clang", "clang-tools", "clang-extra", "clang-tidy", "clang-format", "clang-query", "clang-apply-replacements"]
-license = {text = "MIT License"}
+license = "MIT"
 authors = [
     { name = "Xianpeng Shen", email = "[email protected]" },
     { name = "Brendan Doherty", email = "[email protected]" },