make LimitChunkCountPlugin more functional avoid too much reassigning
make LimitChunkCountPlugin more functional avoid too much reassigning

add some doco for better understanding of what is happening

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