fix(useMouseInElement): check if mouse out of window

[chaii3]

fixes #2454

Description

Additional context

---

What is the purpose of this pull request?

• Bug fix
• New Feature
• Documentation update
• Other

Before submitting the PR, please make sure you do the following

• Read the Contributing Guidelines.
• Read the Pull Request Guidelines.
• Check that there isn't already a PR that solves the problem the same way to avoid creating a duplicate.
• Provide a description in this PR that addresses what the PR is solving, or reference the issue that it solves (e.g. fixes #123).
• Ideally, include relevant tests that fail without this PR but pass with it.

[yysuen]

It seems the import statement prefers not to include index in path. 👇

https://github.com/vueuse/vueuse/blob/main/packages/core/useMouseInElement/index.ts#L3

What about considering to modify the import path?

- import { useEventListener } from '../useEventListener/index'
+ import { useEventListener } from '../useEventListener'

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.