createElement should use `div` tag when no tagname is specified

[laggingreflex]

import {createElement as h} from 'preact-hyperscript'

h('.class') // => creates an "undefined" tag

It should create "div" tag in this case

[queckezz]

Whats the benefit over doing the following?

import { div } from 'preact-hyperscript'

div('.class', ...)