Use the new HTML CodeSniffer npm package

[rowanmanning]

We should be able to use this rather than building via Make. It'd be nice if HTMLCS was just another dependency in package.json.

https://www.npmjs.com/package/html_codesniffer

[rowanmanning]

This won't be possible currently, as the npm package for HTMLCS doesn't include the bundled JavaScript. I might either speak to the maintainers about adding it as a postinstall or prepublish step. For now I'm going to remove from the 5.0 milestone

[paazmaya]

I am working on making this possible, squizlabs/HTML_CodeSniffer#240

[josebolos]

This was been addressed as part of version 5.2.0.