Install prerelease github version if we are not on a released version of Webpacker
Install prerelease github version if we are not on a released version of Webpacker

gauravtiwari/webpacker,rossta/webpacker,gauravtiwari/webpacker,rossta/webpacker,rossta/webpacker,rails/webpacker,rails/webpacker,rossta/webpacker,gauravtiwari/webpacker