fix(useAxios): ignore undefined options

[geektheripper]

Description

When the options parameter is undefined, the code ignores it.

This facilitates writing code in the following manner: export const useFoobar = (opts?: UseAxiosOptions) => useAxios<Foobar>('/foobar', api, opts).

In terms of compatibility, since the code below performs a destructuring assignment on options, passing in undefined would lead to a crash. Therefore, there should not be widespread practical use cases for passing in undefined.

vueuse/packages/integrations/useAxios/index.ts

Lines 146 to 159 in dd82044

	if (
	(args.length === 2 + argsPlaceholder && !isAxiosInstance(args[1 + argsPlaceholder]))
	|| args.length === 3 + argsPlaceholder
	)
	options = args[args.length - 1]
	const {
	initialData,
	shallow,
	onSuccess = noop,
	onError = noop,
	immediate,
	resetOnExecute = false,
	} = options

[Doctor-wu]

LGTM