root 5.34.20

Closes #1155.
lp_solve: fix audit warning

Use NumpyHasHeaders over LanguageModuleDependency.
graph-tool: use Python module deps

Closes #1134.
openblas 0.2.11
lp_solve: fix typo
viennarna 2.1.8
pymol 1.7.2.1
astrometry-net 0.50

Fixes #1139.
Data-science-toolbox: update sha1.

Fixes #1160.