Figure out a way to publish both master and v9 builds without conflicts

[Mixaz017]

Currently master and electron-v9 branches will overwrite existing update files (latest.yml and related files) when running npm run dist which will break the other branch's auto updater. We have to solve this issue before releasing the next version, ideally by finding a way to produce update files with a custom filename, but I don't know if its even possible.

[Mixaz017]

At this point, I think releasing master is more important than figuring out this and releasing both branches. Users can still use v9 by cloning and building locally...