Pillow
Sphinx
jinxed
sphinx-paramlinks
sphinx_rtd_theme
sphinxcontrib-manpage

Pillow
Sphinx>3
jinxed
sphinx-paramlinks
sphinx_rtd_theme
sphinxcontrib-manpage

Fix sphinx errors on readthedocs.org
Fix sphinx errors on readthedocs.org

RTD does "pip install --upgrade sphinx<2" (...),
before "pip install -r docs/requirements.txt",
which says "already satisfied" in regards to "Sphinx"
But sphinx_paramlinks since 0.4.0, is only compatible with '>3',

this line:
https://github.com/sqlalchemyorg/sphinx-paramlinks/commit/3fab7d0964722ccc60b13073d019cf73df16ae83#diff-abe84b8e411ab7bd367ad033685b2b5dR31

raises KeyError for Sphinx less than version 3.
So we freeze our dependencies for docs, to ensure successful RTD builds
again. Also added myself for notifications from RTD so that I get e-mail
notified next time!
