refactor(es6): Upgrade HashedModuleIdsPlugin to es6 (#3659)
refactor(es6): Upgrade HashedModuleIdsPlugin to es6 (#3659)

* refactor(es6): Upgrade HashedModuleIdsPlugin to es6

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