[Python] Set MACOSX_DEPLOYMENT_TARGET for cibuildwheel.

Author: mikeurbach

.github/workflows/uploadWheels.yml

@@ -55,6 +55,7 @@ jobs:
           CIBW_MANYLINUX_X86_64_IMAGE: manylinux2014
           CIBW_BUILD_FRONTEND: build
           SETUPTOOLS_SCM_DEBUG: True
+	  MACOSX_DEPLOYMENT_TARGET: 10.15
 
       - name: Upload (stage) wheels as artifacts
         uses: actions/upload-artifact@v3