feat: switch from setup.cfg to pyproject.toml + hatchling

pyproject.toml

@@ -0,0 +1,42 @@
+
+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.build"
+
+
+[project]
+name = "tailbone-mailchimp"
+version = "0.1.1"
+description = "Tailbone integration for MailChimp"
+readme = "README.rst"
+authors = [{name = "Lance Edgar", email = "lance@edbob.org"}]
+license = {text = "GNU GPL v3+"}
+classifiers = [
+        "Development Status :: 4 - Beta",
+        "Environment :: Web Environment",
+        "Intended Audience :: Developers",
+        "License :: OSI Approved :: GNU General Public License v3 or later (GPLv3+)",
+        "Natural Language :: English",
+        "Operating System :: OS Independent",
+        "Programming Language :: Python",
+        "Programming Language :: Python :: 3",
+        "Topic :: Office/Business",
+        "Topic :: Software Development :: Libraries :: Python Modules",
+]
+dependencies = [
+        "rattail",
+        "rattail-mailchimp",
+        "Tailbone",
+]
+
+
+[project.urls]
+Homepage = "https://rattailproject.org"
+Repository = "https://kallithea.rattailproject.org/rattail-project/tailbone-mailchimp"
+Changelog = "https://kallithea.rattailproject.org/rattail-project/tailbone-mailchimp/files/master/CHANGELOG.md"
+
+
+[tool.commitizen]
+version_provider = "pep621"
+tag_format = "v$version"
+update_changelog_on_bump = true