Update packaging configuration

Enable package discovery and resolve setuptools deprecation warnings
around license configuration.

Signed-off-by: Stephen Finucane <stephenfin@redhat.com>
Change-Id: I250a22d673e043fc771dd4fe136ec56034dc9923

pyproject.toml

@@ -9,13 +9,13 @@ readme = "README.rst"
 authors = [
     {name = "OpenStack", email = "openstack-discuss@lists.openstack.org"},
 ]
+license = "Apache-2.0"
 requires-python = ">=3.10"
 dynamic = ["version", "dependencies"]
 classifiers = [
     "Environment :: OpenStack",
     "Intended Audience :: Developers",
     "Intended Audience :: Information Technology",
-    "License :: OSI Approved :: Apache Software License",
     "Operating System :: OS Independent",
     "Programming Language :: Python",
     "Programming Language :: Python :: 3",
@@ -36,8 +36,8 @@ Repository = "https://opendev.org/openstack/oslo.rootwrap"
 oslo-rootwrap = "oslo_rootwrap.cmd:main"
 oslo-rootwrap-daemon = "oslo_rootwrap.cmd:daemon"
 
-[tool.setuptools]
-packages = ["oslo_rootwrap"]
+[tool.setuptools.packages.find]
+include = ["oslo_rootwrap"]
 
 [tool.mypy]
 python_version = "3.10"