Inline styles module to use csstype for types

Styles typings are currently broken: https://github.com/snabbdom/snabbdom/pull/325

But I propose to make major improvement on this.

There are a good CSS props typings in typestyle, so I propose two options:

1. just take the code from typestyle and make own typings based on it (quite easy - almost copy-paste, no dependency, some additional maintenance needed to actualize typings when changed).
2. use typestyle as dependency and import {CSSProperties}, but this lead to additional dependency (though only used for typing).

What would you say? @paldepind @staltz @mightyiam

[staltz]

Hey @whitecolor, this is a good idea, but I’m going to suggest a third alternative:

1. Publish a library @types/something-something dedicated for CSS props typings

Then use that library in Snabbdom, as well as send a pull request to Typestyle so it can also depend on this new library.

[kuraga]

https://developer.mozilla.org/en-US/docs/Web/API/CSSStyleSheet/CSSStyleSheet