cibuildwheel 2.19, fix env vars

Author: rgommers

.github/workflows/freethreaded_wheels.yml

@@ -100,7 +100,7 @@ jobs:
 
       - name: Build wheels for CPython (macOS) (x86_64)
         if: matrix.cibw_arch == 'x86_64'
-        uses: pypa/cibuildwheel@ba8be0d98853f5744f24e7f902c8adef7ae2e7f3 # 2.18.1
+        uses: pypa/cibuildwheel@a8d190a111314a07eb5116036c4b3fb26a4e3162 # v2.19.0
         with:
           output-dir: dist
         env:
@@ -118,6 +118,9 @@ jobs:
         env:
           CIBW_BUILD: ${{ matrix.cibw_python }}-*
           CIBW_ARCHS_MACOS: ${{ matrix.cibw_arch }}
+          CIBW_PRERELEASE_PYTHONS: True
+          CIBW_FREE_THREADED_SUPPORT: True
+          CIBW_BUILD_FRONTEND: "pip; args: --no-build-isolation"
 
       - uses: actions/upload-artifact@65462800fd760344b1a7b4382951275a0abb4808 # v4.3.3
         with: