Types for vnode style attribute

[panoply]

We could leverage csstype and provide typings on the vnode inline style attribute. Mithril supports hyphen and camelCase CSS properties both of which are covered in csstype.

Basic Example

import { StandardProperties, StandardPropertiesHyphen  } from "csstype";

interface IStyle extends StandardProperties, StandardPropertiesHyphen {}

 interface Attributes extends Lifecycle<any, any> {
    // ...
    style?: IStyle;
  }

Personally feels little much for some intellisense features like completions and checks. I would hypothesize users are not readily reaching for style attributes but given developers tend to expect this type of thing nowadays, might be a discussion point at the very least.