Bump python 39

This MR updates all projects and template files to compile for Python 3.9 and 3.10 only.

Python 3.8 is dead - long live Python 3.10.

assigned to @andre.anjos

changed the description

added 1 commit

• 87076872 - [conda] Remove twine down-pinning (1 year old)

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added 8 commits

• 87076872...183ecf73 - 4 commits from branch master
• fd374bd7 - [gitlab-ci/data] Only build Python 3.9 and up
• f1dcfa00 - [conda_build_config] Do only Python 3.9/3.10 builds
• 1dd1a004 - [doc] Update documentation concerning Python 3.8
• 430b243b - [conda] Remove twine down-pinning (1 year old)

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enabled an automatic merge when the pipeline for 430b243b succeeds

merged

mentioned in commit dbfdd60e