Switch to modern build setup using pyproject.toml (#524)

Author: benkonrath

MANIFEST.in

@@ -88,6 +88,7 @@ Other changes:
 - Dropped support for Django < 4.2.
 - Added support for Python 3.12 and 3.13.
 - Added support for Django 5.0, 5.1, and 5.2.
+- Switched to pyproject.toml based package build using the setuptools build backend.
 
 
 4.0   (2023-04-22)

docs/changelog.rst

@@ -0,0 +1,48 @@
+[build-system]
+requires  =  ["setuptools >=77.0.3"]
+build-backend  =  "setuptools.build_meta"
+
+[project]
+name  =  "django-localflavor"
+dynamic = ["version"]
+requires-python = ">=3.9"
+dependencies = [
+    "django>=4.2",
+    "python-stdnum>=1.6",
+]
+authors = [
+  { name="Django Software Foundation", email="foundation@djangoproject.com" },
+]
+description = "Country-specific Django helpers"
+readme = "README.rst"
+license = "BSD-3-Clause"
+license-files = ["LICENSE"]
+classifiers = [
+    "Development Status :: 5 - Production/Stable",
+    "Environment :: Web Environment",
+    "Framework :: Django",
+    "Framework :: Django :: 4.2",
+    "Framework :: Django :: 5.0",
+    "Framework :: Django :: 5.1",
+    "Framework :: Django :: 5.2",
+    "Intended Audience :: Developers",
+    "Operating System :: OS Independent",
+    "Programming Language :: Python",
+    "Programming Language :: Python :: 3",
+    "Programming Language :: Python :: 3.9",
+    "Programming Language :: Python :: 3.10",
+    "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.13",
+    "Topic :: Internet :: WWW/HTTP",
+]
+
+[project.urls]
+Homepage = "https://django-localflavor.readthedocs.io/en/latest/"
+Source = "https://github.com/django/django-localflavor"
+
+[tool.setuptools.dynamic]
+version = { attr = "localflavor.__version__" }
+
+[tool.flake8]
+max-line-length = 119