Updated PULL_REQUEST_TEMPLATE to include impact migration path and github issue disucssion.
Updated PULL_REQUEST_TEMPLATE to include impact migration path and github issue disucssion.

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