drop python 3.8 and 3.9

Author: Christian-B

setup.cfg

@@ -29,8 +29,6 @@ classifiers =
         Operating System :: Microsoft :: Windows
         Operating System :: MacOS
         Programming Language :: Python :: 3
-        Programming Language :: Python :: 3.8
-        Programming Language :: Python :: 3.9
         Programming Language :: Python :: 3.10
         Programming Language :: Python :: 3.11
         Programming Language :: Python :: 3.12
@@ -42,7 +40,7 @@ keywords =
         pynn
 
 [options]
-python_requires = >=3.8, <4
+python_requires = >=3.10, <4
 packages = find:
 zip_safe = True
 include_package_data = True