EXP: move to cp313-abi3 to avoid undefined symbols

Author: neutrinoceros

.github/workflows/cibuildwheel.yml

@@ -45,10 +45,10 @@ jobs:
       # - Always omit musllinux_aarch64 because it's slow and niche
       # - Always skip free-threading wheels for now
       # - On PPs, omit musllinux for speed
-      # - On PRs, run just oldest and newest Python versions (3.11 is the oldest abi3 target)
+      # - On PRs, run just oldest and newest Python versions (3.13 is the oldest abi3 target)
       run: |
         if [[ "${{ github.event_name }}" == "pull_request" ]]; then
-          CIBW_SKIP="cp3{12,13}-* cp314t-* *musllinux*"
+          CIBW_SKIP="cp3{11,12}-* cp314t-* *musllinux*"
         else
           CIBW_SKIP="cp314t-* *musllinux_aarch64"
         fi

setup.py

@@ -33,8 +33,8 @@
 USE_PY_LIMITED_API = (
     # require opt-in (builds are specialized by default)
     os.getenv('CFTIME_LIMITED_API', '0') == '1'
-    # Cython + numpy + limited API de facto requires Python >=3.11
-    and sys.version_info >= (3, 11)
+    # Cython + numpy + limited API de facto requires Python >=3.13
+    and sys.version_info >= (3, 13)
     # as of Python 3.14t, free-threaded builds don't support the limited API
     and not sysconfig.get_config_var("Py_GIL_DISABLED")
 )