Replace deprecated Bower

[stweil]

npm suggests to replace Bower by Yarn:

npm WARN deprecated bower@1.8.4: We don't recommend using Bower for new projects. Please consider Yarn and Webpack or Parcel. You can read how to migrate legacy project here: https://bower.io/blog/2017/how-to-migrate-away-from-bower/

[kba]

Bower is dead. I mostly use npm+webpack+babel these days. yarn IMHO has little advantage over recent npm versions.

Migration would involve moving all deps from bower.json to package.json, replace bower_components with node_modules throughout.