WIP Add changelog entry with upgrade guide. (#2107)
WIP Add changelog entry with upgrade guide. (#2107)

Taking @connorshea's suggestion from https://github.com/rails/webpacker/pull/2031#issuecomment-483065730 to warn users who were using `@babel/polyfill`
rails/webpacker,gauravtiwari/webpacker,rossta/webpacker,rossta/webpacker,gauravtiwari/webpacker,rossta/webpacker,gauravtiwari/webpacker,rails/webpacker,rossta/webpacker