Export plexus type declarations, remove Neutrino

[tiffon]

Build plexus as ES modules as well as a UMD module. The ES modules have accompanying *.d.ts type declarations. This is possible because layout.worker is being bundled into a self-contained UMD module (which initializes a Worker from a Blob URL). Therefore, the rest of the files can be ES modules.

Change the ES module build to be the default entry point.

Remove Neutrino and deal with Babel, Webpack and TypeScript, directly.

TODO

• Publish plexus@0.1.0 when this PR is approved

[codecov]

Codecov Report

Merging #348 into master will increase coverage by 0.06%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #348      +/-   ##
==========================================
+ Coverage   90.69%   90.75%   +0.06%     
==========================================
  Files         152      152              
  Lines        3288     3288              
  Branches      666      666              
==========================================
+ Hits         2982     2984       +2     
+ Misses        251      249       -2     
  Partials       55       55

Impacted Files	Coverage Δ
...neViewer/TimelineHeaderRow/TimelineViewingLayer.js	90.74% <0%> (+3.7%)	⬆️

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[yurishkuro]

plexus@0.0.2-dev.0

why this ver? patch number is for bug fixes, you're adding new functionality. Of backwards compatibility is not a stated goal at this point, go with 0.1.0, 0.2.0, etc.

[everett980]

This does not look like it was fun! It's clearer, the BUILD.md file is still a doozy but inconjunction with the package.json it makes sense. One note about the .eslintrc but otherwise LGTM.

[everett980]

If this rule is being changed only because of *.d.ts files I believe we can define overrides, something like:

  overrides: [
    {
      files: ['*.d.ts'],
      rules: {
        'no-useless-constructor': 0,
      },
    },
  ],

[tiffon]

That's for *.tsx files, as well. This override allow for the estlint-disable no-useless-constructor comments to be removed from files.