bump main to 2.x and Plone 6.1

setup.cfg

@@ -1,5 +1,5 @@
 [metadata]
-version = 1.4.1.dev0
+version = 2.0.0.dev0
 name = plone.base
 description = Plone Interface contracts, plus basic features and utilities
 long_description = file: README.rst, CHANGES.rst
@@ -13,20 +13,19 @@ license = GPLv2
 classifiers =
     Development Status :: 5 - Production/Stable
     Environment :: Web Environment
-    Framework :: Plone :: 6.0
+    Framework :: Plone :: 6.1
     Framework :: Plone :: Core
     Framework :: Zope :: 5
     License :: OSI Approved :: GNU General Public License v2 (GPLv2)
     Operating System :: OS Independent
     Programming Language :: Python
-    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
 
 [options]
 include_package_data = True
-python_requires = >=3.8
+python_requires = >=3.10
 install_requires =
     setuptools
     # be aware to _not_ add dependencies to plone.app.* or Plones Products.* packages!