pre-commit hook + minor fixes

Pandas to 1.1

[ci skip] Fix wiki commit, 'ci skip' support

Fix git-commit var syntax

Combine jobs within workflows

Update doc, Dockerfile to test GH Actions

I originally tested in my fork where everything happened to be a push to a branch in the same repo.

Switch to GitHub Actions for CI/CD

Removed optional texlive-fonts-extra

Update scipy-notebook packages

- Remove inconsistency of callink make lint-all from the pre-commit hookj
- Remove comment in pre-commit conf
- Add specific targets in makefile to install and run pre-commit
- Change yamlint default conf to avoid line too long (for example on travis file)

Update ubuntu image

Reduces the image size by >1 GB