documenteer#63:

When running documenteer 0.4.5 with PyYAML 5.1 I get the following warning:

lsstsw3/miniconda/envs/lsst-scipipe/lib/python3.7/site-packages/documenteer/sphinxconfig/technoteconf.py:65:
YAMLLoadWarning: calling yaml.load() without Loader=... is deprecated, as the default Loader is unsafe. Please read https://msg.pyyaml.org/load for full details.
_metadata = yaml.load(meta_stream)
Please update Documenteer's YAML usage accordingly (assuming that doing so wouldn't cause a PyYAML version conflict, of course).

We'll release 0.4.7 and 0.5.5 with update yaml usage.