fix(useFetch): don't set isFetching to false when a request is aborted because of a refetch

[mweghorst]

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Description

Fixes #3300

Whenever a request is canceled because of a refetch, isFetching becomes incorrect because the aborted request sets it to false in the finally block.

Additional context

I copied the solution from useAxios:

vueuse/packages/integrations/useAxios/index.ts

Lines 223 to 241 in aca6a79

	executeCounter += 1
	const currentExecuteCounter = executeCounter
	instance(_url, { ...defaultConfig, ...typeof executeUrl === 'object' ? executeUrl : config, cancelToken: cancelToken.token })
	.then((r: any) => {
	response.value = r
	const result = r.data
	data.value = result
	onSuccess(result)
	})
	.catch((e: any) => {
	error.value = e
	onError(e)
	})
	.finally(() => {
	options.onFinish?.()
	if (currentExecuteCounter === executeCounter)
	loading(false)
	})

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🤖 Generated by Copilot at 5d7c249

Fixed a bug in useFetch that caused isFetching to be inaccurate when multiple requests are made. Added a counter to track the latest request and ignore the previous ones.

🤖 Generated by Copilot at 5d7c249

• Add executeCounter variable to useFetch function to track the number of fetch requests (link, link)
• Prevent loading function from setting isFetching state to false when previous fetch requests are finished, by comparing currentExecuteCounter with executeCounter (link)

[fprl]

Having the same problem! Will this be merged? Thanks