Move GEF to a Python 3.10 baseline

[hugsy]

Description

Fixes #1132

Checklist

• My code follows the code style of this project.
• My change includes a change to the documentation, if required.
• If my change adds new code, adequate tests have been added.
• I have read and agree to the CONTRIBUTING document.

[github-actions]

🤖 Coverage update for f89db46 🟢

	Old	New
Commit	674c74d	f89db46
Score	71.6267%	71.6506% (0.0239)

[github-actions]

🤖 Coverage update for f89db46 🟢

	Old	New
Commit	674c74d	f89db46
Score	71.6267%	71.6267% (0)

[github-actions]

🤖 Coverage update for 1b9b838 🟢

	Old	New
Commit	674c74d	1b9b838
Score	71.6267%	71.6319% (0.0052)

[github-actions]

🤖 Coverage update for 1b9b838 🟢

	Old	New
Commit	674c74d	1b9b838
Score	71.6267%	71.6267% (0)