Make url optional. Remove krustykrab from dependencies for react-select-fetch

[soteri-scottmmjackson]

Fixes #190
Fixes #189

[vtaits]

Looks like it would be better to do url ?? '' instead of throwing an error above.

[soteri-scottmmjackson]

Is this different from setting url = "" default here?

react-select-async-paginate/packages/react-select-fetch/src/useMapToAsyncPaginate.ts

Line 34 in d4488d0

url,

I'd decided on throwing an error because it was least surprising compared to the previous behavior of throwing an inspection error.

I think I also might have found a minimal change with no associated functional code that would do it:

export type UseSelectFetchMapParams<
	OptionType,
	Group extends GroupBase<OptionType>,
> = ({ url: string, get: never} | {get: Get, url: never}) & {
	queryParams?: {
		[key: string]: unknown;
	};
	searchParamName?: string | null;
	pageParamName?: string | null;
	offsetParamName?: string | null;
	mapResponse?: MapResponse<OptionType, Group>;
	initialPage?: number;
	defaultInitialPage?: number;
};

I think this means we can have url xor get?

[vtaits]

This library aims to provide a convenient way to work with api endpoints. get is supposed to provide headers to request.

What is your case and why don't you use react-select-async-paginate for it?