ci: try PYO3_USE_ABI3_FORWARD_COMPATIBILITY for Python 3.13

Signed-off-by: Henry Schreiner <henryschreineriii@gmail.com>

.github/workflows/tests.yml

@@ -91,6 +91,8 @@ jobs:
 
       - name: Install python tools
         run: uv pip install --system -r dev-requirements.txt pytest-github-actions-annotate-failures
+        env:
+          PYO3_USE_ABI3_FORWARD_COMPATIBILITY: 1
 
       - name: Configure
         run: cmake -S. -Bbuild -DCMAKE_BUILD_TYPE=Debug -DBOOST_HISTOGRAM_ERRORS=ON ${{ matrix.cmake-extras }}

pyproject.toml

@@ -185,6 +185,11 @@ environment.CFLAGS = "-fexceptions"
 environment.LDFLAGS = "-fexceptions"
 build-frontend = {name = "build", args = ["--exports", "whole_archive"]}
 
+[[tool.cibuildwheel.overrides]]
+select = "cp313*-"
+inherit.environment = "append"
+before-test = "uv pip install --index-url=https://pypi.anaconda.org/scientific-python-nightly-wheels/simple --prerelease=allow numpy"
+
 
 [tool.pylint]
 py-version = "3.7"