Cnx-archive

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- Add pyup exception for psycopg==2.8.6 as newer versions have dropped 2.7 support
- Update urllib3 from 1.26.5 to 1.26.6
- Update sqlalchemy from 1.4.17 to 1.4.20

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- Update urllib3 from 1.26.4 to 1.26.5
- Update sqlalchemy from 1.4.15 to 1.4.17
- Update certifi from 2020.12.5 to 2021.5.30

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- Add exception for updating python-slugify b/c of python support
- Add exception for updating markupsafe b/c of python support
- Add exception for updating Jinja2 b/c of python support
- Update zope.interface from 5.3.0 to 5.4.0
- Update sqlalchemy from 1.4.4 to 1.4.15
- Update six from 1.15.0 to 1.16.0
- Update six from 1.15.0 to 1.16.0
- Update hupper from 1.10.2 to 1.10.3

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- Update SQLAlchemy from 1.4.2 to 1.4.4 (`700 <https://github.com/openstax/cnx-archive/pull/700>`_)

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- Update external dependencies (`697 <https://github.com/openstax/cnx-archive/pull/697>`_)
- Comment changes for pyup to not upgrade pyramid and waitress.

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- Update external dependencies (`692 <https://github.com/openstax/cnx-archive/pull/692>`_)