Adds parsing of type in js doc css property declaration.

[aarondrabeck]

ex. @cssprop {Color} --my-element-color - Controls the color of this element

• outputs type in JSON

ex. { "name": "--my-element-color", "description": "Controls the color of this element", "type": "Color" }

[runem]

Thank you so much for your contribution, I'll go ahead and merge it :-)