chore: Add .npmignore

[fb55]

#508 didn't work as expected; this adds an .npmignore file that excludes all unwanted files.

[fb55]

I accidentally published a version of parse5-html-rewriting-stream with .map files — this also bumps the version of that package.

[fb55]

Turns out this doesn't work either. Seems like ignores don't work with npm workspace publishes?

[fb55]

I'm going with local file removals before publishing for now.

[wooorm]

P.S. you can npm pack locally to see what gets packed up.

We should use files over an .npmignore: allow-lists are better at all this than ignore lists. Too frequently too much is published without a warning. But if important files are forgotten, well that stuff breaks so you get a notice to fix it.

[wooorm]

Note: it’s one or the other.
And perhaps negated files don‘t work. Can you instead do dist/**/*.js instead if you want to include .js in dist/?