Issue - CommentElement don't have querySelector function

[hepiyellow]

Use case

In WSR we have a table, that when it has no data, it renders null to the dom.
React (15) renders null as a Comment Element.

Comment elements don't have querySelector or querySelectorAll.

I encountered one of our tests which failed on this line:
return Array.from(e.querySelectorAll(selector));

unidriver/adapters/jsdom-react/src/index.ts

Line 94 in a8a92cc

return Array.from(e.querySelectorAll(selector));

Expected Behavior

Well, I guess the only thing we could do better,
is print out a more informative error (instead of TypeError: e.querySelectorAll is not a function)

we can have:
$$ unsupported for element of type comment`.