feat(useEventCallback): allow optional callback

[Newbie012]

Updated the useEventCallback hook to accept an optional callback function. This improves developer experience by allowing more flexibility in the use of the hook.

This is quite useful when you want to memoize a callback prop that can be optional. For instance:

type Props<T> = {
  onChange?: (value T | undefined) => void;
}

function Comp({ onChange }: Props) {
  const onChangeRef = useEventCallback(onChange); 

  return <ExpensiveCompImpl onChange={onChangeRef} />
}

[changeset-bot]

🦋 Changeset detected

Latest commit: e00576a

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 2 packages

Name	Type
usehooks-ts	Patch
www	Patch

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[juliencrn]

Hi @Newbie012, well done, thank you 👍

[juliencrn]

@all-contributors please add @Newbie012 for code

[allcontributors]

@juliencrn

I've put up a pull request to add @Newbie012! 🎉