python3-numpy: update to 0.20.0

License file diff:

+ Files: doc/sphinxext/numpydoc/*
+ License: BSD-2-Clause
+   For details, see doc/sphinxext/LICENSE.txt
+
+ Name: scipy-sphinx-theme
+ Files: doc/scipy-sphinx-theme/*
+ License: BSD-3-Clause AND PSF-2.0 AND Apache-2.0
+   For details, see doc/scipy-sphinx-theme/LICENSE.txt

Signed-off-by: Oleksandr Kravchuk <open.source@oleksandr-kravchuk.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>