migrate RuleSet to es6
migrate RuleSet to es6

ts-webpack/webpack,webpack/webpack,NekR/webpack,NekR/webpack,g0ddish/webpack,ts-webpack/webpack,EliteScientist/webpack,SimenB/webpack,g0ddish/webpack,webpack/webpack,jescalan/webpack,jescalan/webpack,webpack/webpack,EliteScientist/webpack,SimenB/webpack,rlugojr/webpack,SimenB/webpack,g0ddish/webpack,jescalan/webpack,rlugojr/webpack,rlugojr/webpack,SimenB/webpack,ts-webpack/webpack,webpack/webpack,ts-webpack/webpack