Update build_wheels_macos.yml

Author: mathias-von-ottenbreit

.github/workflows/build_wheels_macos.yml

@@ -16,7 +16,7 @@ jobs:
       - name: Build wheels
         uses: pypa/[email protected]
         env:
-          MACOSX_DEPLOYMENT_TARGET: "10.14"
+          MACOSX_DEPLOYMENT_TARGET: "10.15"
 
       - uses: actions/upload-artifact@v2
         with: