Does not support dashed attributes as expected (for example HTML5 data-* attributes)

[jarmo]

When using dom2hscript with html including dashed attributes then output is not as expected by virtual-dom and these attributes will get lost in conversion.

See issue #406 for more information.

[dperrymorrow]

Im willing to attempt a PR on this, i have verified the issue reported above.

example

<li data-id="44">

when converted to hyperscript and then rendered to the DOM, the data-id attribute is gone