Add Python 3.14 support

.github/workflows/dist.yml

@@ -43,7 +43,6 @@ jobs:
       - name: Build wheels
         uses: pypa/cibuildwheel@v3.2.1
         env:
-          CIBW_PROJECT_REQUIRES_PYTHON: ">=3.12, <3.15"
           MACOSX_DEPLOYMENT_TARGET: ${{ matrix.os == 'macos-latest' && '15.0' || '13.0' }}
       - uses: actions/upload-artifact@v4
         with:

cypari2/stack.pyx

@@ -16,7 +16,7 @@ Memory management for Gens on the PARI stack or the heap
 
 cimport cython
 
-from cpython.ref cimport PyObject
+from cpython.ref cimport PyObject, _Py_REFCNT
 from cpython.exc cimport PyErr_SetString
 
 from cysignals.signals cimport (sig_on, sig_off, sig_block, sig_unblock,
@@ -260,7 +260,7 @@ cdef class DetachGen:
         cdef GEN res = src.g
         if is_on_stack(res):
             # Verify that we hold the only reference to src
-            if (<PyObject*>src).ob_refcnt != 1:
+            if _Py_REFCNT(<PyObject*>src) != 1:
                 raise SystemError("cannot detach a Gen which is still referenced")
         elif is_universal_constant(res):
             pass

pyproject.toml

@@ -36,12 +36,10 @@ dev = [
     "pkgconf>=2.4.3.post2",
     "pytest>=8.4.2",
 ]
-doc = [
-    "sphinx",
-]
+doc = ["sphinx"]
 
 [tool.cibuildwheel]
-skip = ["*-win32", "cp314t-*"]
+skip = ["*-win32"]
 test-groups = ["dev"]
 test-sources = ["tests", "pyproject.toml"]
 test-command = "python tests/rundoctest.py"