[pushfoo]

Question	Reason
Why?	Can't forget to update if we single-source the truth. 😎
How?	ReST Substitutions!1 🤓
When?	Now (Py >= 3.11 finally gives us tomllib) 😤
Where?	Everywhere... except the error message in arcade/__init__.py and GitHub-side Markdown 😔
Who?	Everybody. Nobody ever has to "remember" to update this ever again 😌

Footnotes

1. For an example of how far it can be taken, see https://fontknife.readthedocs.io/en/main/contributing/substitutions.html ↩

[Cleptomania]

lgtm