Merge pull request #3228 from A5rocks/pep-639

Utilize PEP 639

Author: A5rocks

pyproject.toml

@@ -1,12 +1,14 @@
 [build-system]
-requires = ["setuptools >= 64"]
+# setuptools v77 adds PEP 639 support
+requires = ["setuptools >= 77"]
 build-backend = "setuptools.build_meta"
 
 [project]
 name = "trio"
 description = "A friendly Python library for async concurrency and I/O"
 authors = [{name = "Nathaniel J. Smith", email = "[email protected]"}]
-license = {text = "MIT OR Apache-2.0"}
+license = "MIT OR Apache-2.0"
+license-files = ["LICENSE*"]
 keywords = [
     "async",
     "io",
@@ -17,8 +19,6 @@ classifiers = [
     "Development Status :: 4 - Beta",
     "Framework :: Trio",
     "Intended Audience :: Developers",
-    "License :: OSI Approved :: MIT License",
-    "License :: OSI Approved :: Apache Software License",
     "Operating System :: POSIX :: Linux",
     "Operating System :: MacOS :: MacOS X",
     "Operating System :: POSIX :: BSD",