feat(typings): export ElementQueries typings

[ThibaudAV]

Add the typing of ElementQueries

This allows to use this in ts :

import { ElementQueries } from 'css-element-queries';
...
ElementQueries.listen();
ElementQueries.init();

[ThibaudAV]

A little up for this PR 🙃
cc: @marcj

[indfnzo]

Hey @marcj, we need this PR merged too. The last PR only added ResizeSensor to the typings, so our typescript builds started complaining about missing exports (since it now detects a .d.ts file).

Would be great if you can get this tagged soon!

[marcj]

Ops, overlooked that one, sorry. Merged, thanks!

[indfnzo]

Thank you!