Stripping comments in production builds

It looks like we preserve comments when running the browserify transform on the tagged template literals [source](https://github.com/choojs/nanohtml/blob/master/lib/browserify-transform.js#L112-L114).

I'd like to remove all comments from production builds in order to:

1. Not accidentally leak information/context that I did not want to leak in prod.
2. Reduce build size.

First things that come to mind:

# Potential Solution 1

`browserify -t [nanohtml --strip-comments ]` strips comments

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FWIW I wouldn't mind if stripping comments was the default or if nanohtml just always stripped comments since I never use comments in the browser. I only use HTML comments while reading code.

.. But I recognize that other people might want them in by default / that could maybe lead to less confusion maybe.. so whatever works!

Start by reading lib/browserify-transform.js around lines 112-114 and trace how the Browserify transform handles comments in tagged template literals. Determine how comment stripping should be selected or defaulted, then verify that production output contains no comments while the surrounding template output remains unchanged.

Written by the indexing model from the issue text.