Preliminary support for Python 3.13a3

.github/workflows/tests.yml

@@ -195,12 +195,9 @@ jobs:
         if: matrix.python-version == '3.13.0-alpha - 3.13.0'
         run: |
           # Install to collect dependencies into the (pip) cache.
-          # cffi will probably have no public release until a Python 3.13 beta
-          # or even RC release, see https://github.com/python-cffi/cffi/issues/23
-          echo "cffi @ git+https://github.com/python-cffi/cffi.git@954cab4f889fb019a7f90df153ee1be501495f58" > cffi_constraint.txt
           # Use "--pre" here because dependencies with support for this future
           # Python release may only be available as pre-releases
-          PIP_CONSTRAINT=cffi_constraint.txt pip install --pre .[test]
+          pip install --pre .[test]
       - name: Install zope.index and dependencies
         if: matrix.python-version != '3.13.0-alpha - 3.13.0'
         run: |

.meta.toml

@@ -2,15 +2,15 @@
 # https://github.com/zopefoundation/meta/tree/master/config/c-code
 [meta]
 template = "c-code"
-commit-id = "e45966cd"
+commit-id = "08a3cc69"
 
 [python]
 with-appveyor = true
 with-windows = false
 with-pypy = true
 with-docs = true
 with-sphinx-doctests = true
-with-future-python = false
+with-future-python = true
 with-macos = false
 
 [tox]