Modernize packaging: use pyproject.toml instead of setup.py/cfg

pyproject.toml

@@ -1,8 +1,60 @@
 [build-system]
-requires = ["setuptools>=42", "wheel", "setuptools_scm[toml]>=3.4"]
+requires = ["setuptools>=64", "setuptools_scm>=8"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "django-redshift-backend"
+dynamic = ["version"]
+description = "Redshift database backend for Django"
+readme = "README.rst"
+license = {file = "LICENSE"}
+requires-python = ">=3.7, <4"
+authors = [
+    { name = "shimizukawa", email = "[email protected]" },
+]
+keywords = [
+    "django",
+    "redshift",
+]
+classifiers = [
+    "Development Status :: 5 - Production/Stable",
+    "Environment :: Plugins",
+    "Framework :: Django",
+    "Framework :: Django :: 3.2",
+    "Framework :: Django :: 4.0",
+    "Intended Audience :: Developers",
+    "License :: OSI Approved :: Apache Software License",
+    "Programming Language :: Python",
+    "Programming Language :: Python :: 3",
+    "Programming Language :: Python :: 3.7",
+    "Programming Language :: Python :: 3.8",
+    "Programming Language :: Python :: 3.9",
+    "Programming Language :: Python :: 3.10",
+    "Topic :: Software Development :: Libraries :: Python Modules",
+]
+dependencies = [
+    "django",
+]
+
+[project.optional-dependencies]
+psycopg2 = [
+    "psycopg2",
+]
+psycopg2-binary = [
+    "psycopg2-binary",
+]
+
+[project.urls]
+Documentation = "https://django-redshift-backend.readthedocs.io/"
+Homepage = "https://github.com/jazzband/django-redshift-backend"
+"Release notes" = "https://django-redshift-backend.readthedocs.io/en/master/changes.html"
+Source = "https://github.com/jazzband/django-redshift-backend"
+Tracker = "https://github.com/jazzband/django-redshift-backend/issues"
+
+[tool.setuptools]
+include-package-data = true
 
 [tool.setuptools_scm]
 # this empty section means: use_scm_version=True
 version_scheme = "guess-next-dev"
 local_scheme = "no-local-version"
-

tox.ini

@@ -62,3 +62,8 @@ deps =
 commands =
     python -m build
     twine check dist/*
+
+[flake8]
+max-line-length=120
+ignore = W504
+exclude = tests/testapp/migrations