refactor(es6): Upgrade lib/webpack.js to es6
refactor(es6): Upgrade lib/webpack.js to es6

webpack/webpack,ts-webpack/webpack,NekR/webpack,g0ddish/webpack,pugnascotia/webpack,EliteScientist/webpack,SimenB/webpack,webpack/webpack,webpack/webpack,cesarandreu/webpack,SimenB/webpack,jescalan/webpack,g0ddish/webpack,nkzawa/webpack,EliteScientist/webpack,rlugojr/webpack,rlugojr/webpack,NekR/webpack,jescalan/webpack,cesarandreu/webpack,cesarandreu/webpack,nkzawa/webpack,ts-webpack/webpack,ts-webpack/webpack,pugnascotia/webpack,SimenB/webpack,ts-webpack/webpack,nkzawa/webpack,SimenB/webpack,g0ddish/webpack,pugnascotia/webpack,webpack/webpack,rlugojr/webpack,jescalan/webpack