Build: use python >= 3.9

setup.cfg

@@ -27,14 +27,13 @@ classifiers =
 [options]
 zip_safe = false
 include_package_data = true
-python_requires = >=3.7,<3.10
+python_requires = >=3.9
 test_suite = tests
 install_requires =
 # deprecated/redundant with pyproject.toml, but lets keep both ways around for now
 setup_requires =
     setuptools >=39.2.0
     setuptools_scm >= 4.1.2
-    wheel
 [options.extras_require]
 # To install these dependencies, run pip install .[test]
 test =