Validating: problems found: - require? X cairo_jupyter

[stuaxo]

After the extension is installed it fails a validation check

  cairo_jupyter  enabled 
  - Validating: problems found:
    - require?  X cairo_jupyter

Have opened bug on jupyter-pip to ask for info

https://github.com/jdfreder/jupyter-pip/issues/24

This bug has been around for ages, probably worth tracking + fixing :)

[stuaxo]

Fixed in PR #11