refactor(all): pick changes from v1 and refactor build/tests

[bigopon]

• cherry picked changes from @zewa666 for keyboard event type

• cherry picked changes from @timfish for native dialog renderer

• rename default dialog renderer to ux-dialog-renderer (bold file name and class name), still keep old export

• Breaking change: modify useRenderer method to accept 'ux' | 'native' for picking a dialog renderer, instead of asking for impl directly

• modify build to use rollup for all builds, example:

• modify typings build: put all in types folder. It looks like this

• add es2017 dist (not really different from es2015, just consistent with the newer build from other repos)

• use karma + webpack for test instead of requirejs

• remove doc scripts (couldn't figure out why typedoc is upset)

For the breaking change related to useRenderer, I think it's a good compromise, (as @3cp would love to say). If folks complain, we can add change it back to:

  useRenderer(renderer: AbstractRenderer, settings?);

from

  useRenderer(type: 'ux' | 'native', settings?);

@EisenbergEffect @RomkeVdMeulen @StrahilKazlachev

close #335

[bigopon]

CI failing because it can't auto bump the .rc version

[bigopon]

An update: adjust useRenderer interface so that it can have backward compat, while enabling ease of use with bundler/code:

  useRenderer(renderer: RenderStatic, settings);

to

  useRenderer(renderer: RenderStatic | Promise<RendererStatic> | 'ux' | 'native', settings);

We just give 2 string literal values as a hint for what is provided by default. thoughts?

[bigopon]

I've update the build so that we now have css in less auto built whenever source is built. Also split CSS into its separate chunk so if one prefers not to use default CSS or use native dialog renderer, a lot of unused code can be avoided.

@EisenbergEffect this is ready to go

[EisenbergEffect]

As usual, amazing work @bigopon ! I like the api with the string literals for convenience while still enabling custom renderer instances. Nice touch.