* Update core to use new Webpack and TSConfig
* Bump webpack dep
* Update JS build action
* Copy custom `.d.ts` files to `dist-typings` folder on typings compile
* Run workflow against action v2
This allows us to have a moving tag, like first party actions have.
* Remove bundle analyzer from core
* Use webpack config 0.1.0-beta.16.2
* Add note about checking flarum-tsconfig
* Add option to build with webpack bundle analyzer
* Bump npm to v7 as recommended in actions/setup-node#213
* Workaround for npm/cli#558
* Add missing dep
* Bump dependencies and add missing typing libraries
* Fix expose-loader breaking changes
* Expose jQuery using its own typings instead of ours
* Extend jQuery typings with our own custom $.fn helpers
* Use jQuery typings for Component's `this.$` attribute
* Format webpack config file
* Use Spin.js 3.1.0
This allows us to get started with converting all Flarum JavaScript code to TypeScript.
In addition, we will have time to experiment to find the best Webpack configuration before integrating into flarum-webpack-config.
See flarum/flarum-webpack-config#3.
* Replace gulp with webpack and npm scripts for JS compilation
* Set up Travis CI to commit compiled JS
* Restructure `js` directory; only one instance of npm, forum/admin are "submodules"
* Refactor JS initializers into Application subclasses
* Maintain partial compatibility API (importing from absolute paths) for extensions
* Remove minification responsibility from PHP asset compiler
* Restructure `less` directory
