Fixed type hint for patch_signals

[nicobako]

This is a small change to fix type hints for the patch_signals function.

I believe that, if the signals is a dict, then it needs to be json-encodable.

Since you call json.dumps() on line 154, then it must be one of the basic types.

From the json.dumps docs:

Serialize obj to a JSON formatted str.

If skipkeys is true then dict keys that are not basic types
(str, int, float, bool, None) will be skipped
instead of raising a TypeError.

Thanks for the awesome python package!

[gazpachoking]

This could be made more specific, but this PR isn't quite right. Signals can also be lists and dicts. I started making a helper for it in the action helper branch, but I haven't gotten back to work on it more. If we create a generic typealias for SignalValue like in that branch, then the proper annotation here would be something like like type SignalDict = dict[str, SignalValue]

datastar-python/src/datastar_py/attributes/__init__.py

Lines 103 to 111 in 3b9a5b8

	SignalValue: TypeAlias = Union[
	str,
	int,
	float,
	bool,
	dict[str, "SignalValue"],
	list["SignalValue"],
	None,
	]

[nicobako]

Yeah, you are right, I didn't think of the case where the value could be a list or a dict.

I just updated the PR to use SignalValue in f0b3a9a

[gazpachoking]

Oh, lol. I thought I only had SignalValue in that unreleased branch. This looks good. I should probably move where SignalValue is defined, but that doesn't really matter for this patch. Thanks!