We have moved to https://codeberg.org/KOLANICH-libs/ClassDictMeta.py, grab new versions there.
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If you don't want to participate in harming yourself, it is recommended to follow the lead and migrate somewhere away of GitHub and Micro$oft. Here is the list of alternatives and rationales to do it. If they delete the discussion, there are certain well-known places where you can get a copy of it. Read why you should also leave GitHub.
Just a metaclass allowing you to create some dicts easier. Like
class a(metaclass=ClassDictMeta):
a = "b"
c = 0xD
# equivalent to a = {"a": "b", "c": 0xD}