Merge in staging

See merge request !14

Merge new version from staging into master

See merge request !13

# Conflicts:
#   README.md

- new dd4hep and acts versions

Optimize CI setup, add libpoppler, and some minor polish

See merge request !11

I think the old api was being used and was removed when the gitlab
server was updated.

Note gitlab is moving to graphql api in the next version
https://docs.gitlab.com/ee/api/graphql/

- don't install a root wrapper script (sometimes breaks root when working in the
container)
- gaudi tag  stuck on gcc 9

New v2.2.0 release version

See merge request !10