fix(remix-react): add event type to useBeforeUnload

[tomas-goncalves]

Add event type to onBeforeUnload allowing it to be used in typescript code without errors

Fixes issue #1719

[remix-cla-bot]

Hi @Runner-dev,

Welcome, and thank you for contributing to Remix!

Before we consider your pull request, we ask that you sign our Contributor License Agreement (CLA). We require this only once.

You may review the CLA and sign it by adding your name to contributors.yml.

Once the CLA is signed, the CLA Signed label will be added to the pull request.

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Thanks!

- The Remix team

[remix-cla-bot]

Thank you for signing the Contributor License Agreement. Let's get this merged! 🥳

[sergiodxa]

@Runner-dev could you add yourself to https://github.com/remix-run/remix/blob/main/contributors.yml ?

[mcansh]

@Runner-dev could you add yourself to main/contributors.yml ?

looks like they did 18548f7 - I'll check the cla bot

never mind, i think the dev merge removed it 🙈

[MichaelDeBoey]

@Runner-dev Could you please rebase your branch onto dev?
That way your name will be added to contributors.yml again and we can merge this PR.

[github-actions]

🤖 Hello there,

We just published version v0.0.0-nightly-5020fa4-20221029 which includes this pull request. If you'd like to take it for a test run please try it out and let us know what you think!

Thanks!