docs: transition to webpack 5, and bump deps (#839)
* Update all deps to patch, or minor * update clean-webpack-plugin from 1.0.1 -> 4.0.0 * docs: update to webpack 5.68.0
* Update all deps to patch, or minor * update clean-webpack-plugin from 1.0.1 -> 4.0.0 * docs: update to webpack 5.68.0