Add TypeScript declarations

[wKovacs64]

(...and also fixed a couple typos)

The following usage will get you typed parameters to your handler function:

useEventListener<React.KeyboardEvent>('keydown', ({ key, shiftKey }) => {
  /* sweet, `key` is a string and `shiftKey` is a boolean */
});

[donavon]

Nice! Thank you.

[donavon]

@allcontributors[bot] please add @wKovacs64 for code, doc

[allcontributors]

@donavon

I've put up a pull request to add @wKovacs64! 🎉

[donavon]

@wKovacs64 published on npm as 0.1.3. Thanks again 🏆

https://www.npmjs.com/package/@use-it/event-listener