Remove Buffer dependency

[mikolalysenko]

The buffer data type doesn't seem to be as useful as the other typed array data types, and also carries a huge bundle size penalty. In the future it might be worth dropping this feature.

[mreinstein]

@mikolalysenko we could simply ignore the buffer module via browserify: https://github.com/substack/browserify-handbook#ignoring-and-excluding

This would make the browser bundles much smaller, and not break support for anyone that is using this module from node.

[mreinstein]

Ignore my previous comment from 8 years ago. :-D At this point I think it's just better to remove Buffer entirely.