Summary:
This is quite hacky but avoids having to patch electron-builder directly.
We're intercepting the signing/editing process on Windows and triggering it ourselves while overriding version information that otherwise changes for every release causing cache invalidations to occur. This does *not* change the version display in the app as we're not depending on the PE metadata but on the version in the `package.json`.
Reviewed By: nikoant, mweststrate
Differential Revision: D25973921
fbshipit-source-id: 0fad07f3597fba9927643d24fba12f8750ca54bc
aacf5b8565