Suggestiono - a rewrite in typescript

[gforge]

Hi,

thank you for this excellent repo! I found that the code-base was somewhat old and in order to understand it better I did a rewrite to TypeScript: https://github.com/gforge/react-typeahead-ts

I think most of the logic is in place but there are plenty of tests that still need to be merged. I found some strange details in the searchOptions tests. If you wish I can create a PR with the repo but I think it may be somewhat overwhelming. Anyone who is interested or willing to participate is of course welcome.

Thanks!
Max