Update Python version support.

Author: icemac

setup.py

@@ -25,7 +25,7 @@
           'Sources': ('https://github.com/zopefoundation/'
                       'Products.PythonScripts'),
       },
-      license='ZPL 2.1',
+      license='ZPL-2.1',
       description='Provides support for restricted execution of Python '
                   'scripts in Zope.',
       author='Zope Foundation and Contributors',
@@ -44,15 +44,14 @@
           'Operating System :: OS Independent',
           'Programming Language :: Python',
           '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',
           'Programming Language :: Python :: 3.13',
           'Programming Language :: Python :: Implementation :: CPython',
       ],
-      python_requires='>=3.8',
+      python_requires='>=3.9',
       install_requires=[
           'setuptools',
           'AccessControl',