refactor: Remove _dict_update

[hoxbro]

I think this function does exactly what a normal dict does if the first argument is a dict.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 87.35%. Comparing base (6c28e65) to head (2cc7a84).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #980      +/-   ##
==========================================
- Coverage   87.36%   87.35%   -0.02%     
==========================================
  Files           9        9              
  Lines        4939     4935       -4     
==========================================
- Hits         4315     4311       -4     
  Misses        624      624              

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[hoxbro]

Unrelated but this looks more correct to me

Suggested change

	return issubclass(type(value), MUTABLE_TYPES)
	return isinstance(value, MUTABLE_TYPES)

[hoxbro]

I haven't checked if any downstream uses this.

[hoxbro]

It does not look like we use this downstream.

[jbednar]

Seems fine to me, though I do always worry if I can't remember why it was done this way originally. Maybe some ancient issue with an earlier Python version?

[hoxbro]

Seems fine to me, though I do always worry if I can't remember why it was done this way originally. Maybe some ancient issue with an earlier Python version?

Either that, it was more complex at some point, or just forgetting that this is possible.