Upgrade sbt to deal with newer JDK versions, fix issues like that.
Add a webpack dependency to fix issue reported by @bodqhrohro (apparently our CI now experiences it, too).
Update Scala.js bundler (without update it wasn't able to produce proper bundle); fix paths for the new bundler version.
Due to bundler update I had to update Scala.js as well. After that, I momentarily encountered some new shitty-gritty issues with scalaJSUseMainModuleInitializer, but was able to overcome them.
scalaJSUseMainModuleInitializer
, but was able to overcome them.