Remove require of encoding-indexes.js

[arv]

Right now encoding-indexes.js is always required in a node like environment (such as browserify).

This was done in a85ce6f

It would be better if encoding-indexes.js was never implicitly included.

[inexorabletash]

Suggestions (or PRs) appreciated. I want to keep things testable out of the box (i.e. runnable via gh-pages) but otherwise I'm amenable to pretty much anything.

[cgwyllie]

Something with this that would allow selective inclusion of different encodings would be good for us. We are only interested in UTF-8 and build using webpack, but we end up with all encodings getting bundled.

Not sure what the best option might be..

[inexorabletash]

Again, happy to do this but I am unfamiliar with these environments and so guidance is needed.

[surfjedi]

Yes I am experiencing the same thing - using web pack to build and don't want indexes.. great polyfill tho