**Typings URL:** https://github.com/beenotung/typed-horizon

**Questions (for new typings):**

* [x] Does the README explain the purpose of the typings and have a link
to the JavaScript project?
* [ ] Do the typings follow the source structure (e.g. `index.js` <->
`index.d.ts`)?
no, the typing is in a single file
* [x] Are they external or global modules according the source (e.g. see
README sources)?
they are global modules

changed to global typing;

refer to raw file directly:
eliminate the need to maintain a 'release branch' (reduce duplicated
storage);

in order to import npm:rxjs
(instead of typings:rx-lite previously)