Use exclusively pyproject.toml for packaging metadata

.packit.yaml

@@ -10,8 +10,6 @@ actions:
   post-upstream-clone:
     - "mkdir ../distro"
     - "bash -c '(cd ../distro; wget https://src.fedoraproject.org/rpms/python-dbus-python-client-gen/raw/rawhide/f/python-dbus-python-client-gen.spec)'"
-  get-current-version:
-    - "python3 setup.py --version"
 
 srpm_build_deps:
   - wget2

pyproject.toml

@@ -1,7 +1,46 @@
 [build-system]
-requires = ["setuptools"]
+requires = ["setuptools>=77"]
 build-backend = "setuptools.build_meta"
 
+[project]
+name = "dbus-python-client-gen"
+authors = [{name = "Anne Mulhern", email = "amulhern@redhat.com"}]
+description = "transforms values into properly wrapped dbus-python objects"
+classifiers = [
+    "Development Status :: 4 - Beta",
+    "Intended Audience :: Developers",
+    "Operating System :: POSIX :: Linux",
+    "Programming Language :: Python",
+    "Programming Language :: Python :: 3",
+    "Programming Language :: Python :: Implementation :: CPython",
+    "Programming Language :: Python :: Implementation :: PyPy",
+    "Topic :: Software Development :: Libraries",
+    "Topic :: Software Development :: Libraries :: Python Modules",
+]
+requires-python = ">=3.12"
+license = "MPL-2.0"
+dependencies = [
+    "dbus-python",
+    "into-dbus-python>=0.8",
+]
+dynamic = ["version"]
+
+[project.readme]
+file = "README.rst"
+content-type = "text/x-rst"
+
+[project.urls]
+Homepage = "https://github.com/stratis-storage/dbus-python-client-gen"
+
+[tool.setuptools]
+package-dir = {"" = "src"}
+packages = ["dbus_python_client_gen"]
+platforms = ["Linux"]
+include-package-data = false
+
+[tool.setuptools.dynamic]
+version = {attr = "dbus_python_client_gen._version.__version__"}
+
 [tool.ruff]
 target-version = "py312"
 line-length = 88