Use SPDX license identifier (#36)

* Use SPDX license identifier

* Move changelog entry to packaging

* Update CHANGES/36.packaging.rst

Co-authored-by: 🇺🇦 Sviatoslav Sydorenko (Святослав Сидоренко) <[email protected]>

---------

Co-authored-by: 🇺🇦 Sviatoslav Sydorenko (Святослав Сидоренко) <[email protected]>

Author: cdce8p

CHANGES/36.packaging.rst

@@ -0,0 +1,3 @@
+The packaging metadata switched to including an SPDX license identifier introduced in :pep:`639` -- by :user:`cdce8p`.
+
+As a side effect, the minimum required version of ``setuptools`` increased to v77.

pyproject.toml

@@ -1,19 +1,18 @@
 [build-system]
-requires = ["setuptools>=61.0"]
+requires = ["setuptools>=77.0"]
 build-backend = "setuptools.build_meta"
 
 [project]
 name = "aiohttp-asyncmdnsresolver"
 dependencies = ["aiodns>=3.2.0", "aiohttp>=3.10.0", "zeroconf>=0.142.0"]
 description = "An async resolver for aiohttp that supports MDNS"
 dynamic = ["version"]
-license = {file = "LICENSE"}
+license = "Apache-2.0"
 readme = "README.rst"
 requires-python = ">=3.9"
 classifiers = [
     "Programming Language :: Python",
     "Programming Language :: Python :: 3",
-    "License :: OSI Approved :: Apache Software License",
     "Operating System :: OS Independent",
     "Intended Audience :: Developers",
     "Topic :: Internet :: WWW/HTTP",