Webpack 5 Release

• webpack-dev-server used for dev builds in place of webpack-dev-middleware & webpack-hot-middleware.
• chokidar (webpack-dev-server dependency) for live reloading of html template partials in place of LiveReload.
• terser removed due to internal Webpack dependency, migrated to CssMinimizerPlugin
• removed hard-source-webpack-plugin

Notes: Bundle errors resulting from:

• jantimon/html-webpack-plugin#1501
• GoogleChromeLabs/preload-webpack-plugin#132