* Update to version 4 of webpack.
* For that matter, update *every dependency* to the latest available version.
* Remove the babel build target for Edge, as it doesn't seem to be necessary with webpack 4 and tenser.
* Add support for optional chaining and nullish coalescing via Babel transformations.
* Update the clips domain version to work better. Or at all, really.
* Remove unused code from i18n.
* Remove the last `<style>` from vue component files. They don't work that way now anyways.
* Fix a bug in Raven's report handler.
* Fix a bug with the menu button in browsers that don't understand `:scope` within `querySelector()`.
* Added: Initial support for chat on Clips.
* Fixed: Do not attempt to apply the dark theme to the Twitch Prime landing page.
* Fixed: Remove debug logging from Chat on Videos.
