Update azure-pipelines.yml

Author: sdpython

azure-pipelines.yml

@@ -93,8 +93,8 @@ jobs:
     displayName: 'Runs Unit Tests'
   - script: |
       python -m pip install cibuildwheel
-      set CIBW_BEFORE_BUILD=pip install .
-      set CIBW_BEFORE_BUILD=pip install pybind11 cython numpy scipy pyquickhelper scikit-learn pandas pandas_streaming
+      set CIBW_BEFORE_BUILD="pip install ."
+      set CIBW_BEFORE_BUILD="pip install pybind11 cython numpy scipy pyquickhelper scikit-learn pandas pandas_streaming"
       set CIBW_BUILD="cp37-win_amd64 cp38-win_amd64 cp39-win_amd64"
       python -m cibuildwheel --output-dir dist/wheelhouse
     displayName: 'Build Package many'