Update for modern Python compatibility

pyproject.toml

@@ -0,0 +1,52 @@
+[build-system]
+requires = ["setuptools>=61.0", "wheel"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "certbot-dns-corenetworks"
+version = "1.0.0"
+description = "Core Networks DNS Authenticator plugin for Certbot"
+readme = "README.md"
+requires-python = ">=3.10"
+license = { text = "Apache License 2.0" }
+authors = [{ name = "Hendrik Hogertz", email = "info@hogertz.eu" }]
+keywords = ["certbot", "dns", "corenetworks", "letsencrypt"]
+classifiers = [
+    "Development Status :: 4 - Beta",
+    "Environment :: Plugins",
+    "Intended Audience :: System Administrators",
+    "License :: OSI Approved :: Apache Software License",
+    "Operating System :: POSIX :: Linux",
+    "Programming Language :: Python",
+    "Programming Language :: Python :: 3",
+    "Programming Language :: Python :: 3.10",
+    "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.13",
+    "Topic :: Internet :: WWW/HTTP",
+    "Topic :: Security",
+    "Topic :: System :: Installation/Setup",
+    "Topic :: System :: Networking",
+    "Topic :: System :: Systems Administration",
+    "Topic :: Utilities",
+]
+dependencies = ["certbot>=2.0.0", "acme>=2.0.0", "requests>=2.20.0"]
+
+[project.optional-dependencies]
+dev = ["pytest>=7.0.0", "pytest-cov>=4.0.0"]
+
+[project.urls]
+Homepage = "https://git.hogertz.eu/hendrik-hog/certbot-dns-corenetworks"
+Repository = "https://git.hogertz.eu/hendrik-hog/certbot-dns-corenetworks"
+
+[project.entry-points."certbot.plugins"]
+dns-corenetworks = "certbot_dns_corenetworks.dns_corenetworks:Authenticator"
+
+[tool.setuptools]
+packages = ["certbot_dns_corenetworks"]
+
+[tool.setuptools.package-data]
+certbot_dns_corenetworks = ["py.typed"]
+
+[tool.pytest.ini_options]
+testpaths = ["certbot_dns_corenetworks"]