[FIX] put cursor inside html

[yelizariev]

closes #624

Requirements

• Have you viewed your changes locally on the demos page, located on https://github.com/mattboldt/typed.js/blob/master/index.html?

• If necessary, have you added a new demo to the index.html list of demos? If it's an improvement or small addition, have you added it to an existing demo on the demos page?

• If applicable, have you created a fork of the following JSFiddle with your branch's code and your new feature showcased?

Description of the Change

This change allows using rich html and properly put the cursor, because otherwise it always stays at the next line of typed text.

Benefits

Issues