Upgrade webpack and packages

[amitmbee]

• Uses [email protected]
• Use ts-loader instead of awesome-typescript-loader as it doesn't support webpack 4 ( ref )
• Removed .babelrc as we aren't using babel-loader (ts-loader takes care of that)
• Removed webpack-dev-server
• Update react and react-dom to (16.2.0 --> 16.3.2)
• Update copy-webpack-plugin ( 4.0.1 --> 4.5.1)
• Updated typescript package ( 2.3.2 --> 2.8.1 ) and css-loader (minor upgrade)
• Add tslint and tslint-react rules
• Add fork-ts-checker-webpack-plugin package to list tslint errors and warnings in dev builds.
• Use two webpack configs (one for dev and one for prod) - Logs aren't printed in production builds.
• Added clean-webpack-plugin to clean dist before building.

Build time comparisions using [email protected] and [email protected]