In March there were two attempts to update python-numpy (#45698 and #47183
/ #47184) which failed to build python-pandas and python-scipy.

The attached patches update and successfully build python-numpy,
python-pandas, python-matplotlib, and python-scipy.

In addition to modified dependencies, python-matplotlib expanded the regex
to silence image font differences and I was only able to successfully build
and test python-pandas when replacing python-openpyxl
with python-xlsxwriter.

Greg