BUG: Pip 20.3 is causing Linux py38 np dev pipeline to fail
The first pipeline to fail was 2a115d5d750c65765913c1940ac4c85f4ab51df9 which also was the first pipeline using pip 20.3

This seems to be a problem with scipy version.

@jreback @jbrockmendel @jorisvandenbossche 


Last pipeline to work:
https://dev.azure.com/pandas-dev/pandas/_build/results?buildId=49130&view=logs&j=eab14f69-13b6-5db7-daeb-7b778629410b&t=71ac627c-7b38-59b1-014b-81753001ec5e

First fo fail:
https://dev.azure.com/pandas-dev/pandas/_build/results?buildId=49159&view=logs&j=eab14f69-13b6-5db7-daeb-7b778629410b&t=71ac627c-7b38-59b1-014b-81753001ec5e&l=333