Reduce npm package size

[ai]

This change reduces source-map-js footprint in node_modules from 700 KB (!) to 100 KB.

Now, source-map-js is 77% of installing size of PostCSS 😓.

• Remove dist/ with webpack pre-build. Use case for pre-build is very limited and can be easily replaced by webpack on user’s side. For instance, most of my open source doesn’t have pre-build files.
• Remove long API docs from README.md in npm package by clean-publish. You will to release this package with npx clean-publish instead of npm publish

Also #6 can be merged to fix now useless package.json key,

[7rulnik]

@ai sorry for slow response

I think we should keep webpack, because currently, it is necessary for benchmarking in a browsers.
Also, we can remove API documentation and replace it with link to original source-map documentation.

And I like the idea of removing comments from published code. If you think it's safe enough, so let's do it.

[7rulnik]

And as I understand, it should be major release? I'm fine with it. We can release it as 1.0.0 BTW. I thought that it will be useful to try keep in sync versions with original source-map, but seems that it doesn't make any sense.

[ai]

I think we should keep webpack, because currently, it is necessary for benchmarking in a browsers.

Can we build webpack version just to use in benchmark and do not put file to npm package?

[ai]

And as I understand, it should be major release

Yeap, let’s do major (1.0 or 0.7).

[ai]

😍