Add Jinja2 & nbformat to requirements

This templating library is used in calibrate.py. It's also required by Jupyter, so it would be installed anyway, but the version wasn't controlled. I've arbitrarily pinned it to the current latest version (2.11.2).

added 1 commit

• 2e6c7630 - Require nbformat explicitly

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Similarly for nbformat, where the latest version is 5.0.7.

changed title from Add Jinja2 to requirements to Add Jinja2 & nbformat to requirements

LGTM

merged

mentioned in commit 2ae72647