Replace webpack-visualizer-plugin with webpack-stats-plugin

[compulim]

Fixes #2583.

Changelog Entry

Changed

• bundle: Webpack will now use webpack-stats-plugin instead of webpack-visualizer-plugin, by @compulim in PR #2584
  • This will fix #2583 by not bringing in transient dependency of React
  • To view the bundle stats, browse to https://chrisbateman.github.io/webpack-visualizer/ and drop the file /packages/bundle/dist/stats.json

Description

(Copied from #2583.)

This bug only affect users who "npm install" Web Chat with devDependencies, e.g. playground or any packages that use npm link or lerna to include Web Chat in their build.

When botframework-webchat is installed with devDependencies, it installed React 0.14.9 due to transient dependencies from webpack-visualizer-plugin

botframework-webchat do not include devDependencies of React 16.8.6. This is because of the "Rules of Hooks" to maintain a single instance of React. We do include React 16.8.6 at the root package, so both playground and botframework-webchat-* will share the same instance of React.

Specific Changes

• bundle: Replace webpack-visualizer-plugin plugin with webpack-stats-plugin

---

• Testing Added
  • No tests are added for playground

[tdurnford]

LGTM

[compulim]

FYI, this should be caught earlier if we have #2505. We are prophets (or things just bite us back.)

[coveralls]

Coverage remained the same at 63.902% when pulling 1eef614 on compulim:fix-2583 into a97fbb8 on microsoft:master.