proper macos build

Author: rflamary

.github/workflows/build_wheels.yml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-18.04, macosx-latest, windows-latest]
+        os: [ubuntu-18.04, macos-latest, windows-latest]
         # macosx-latest, windows-latest
 
     steps: