Migrate to electron-builder since it has muon support now

[bbondy]

electron-builder now supports muonVersion so I think we can use that directly now.
electron-userland/electron-builder#1394 (comment)

[luixxiul]

Related: should we change electron on this line to Muon?
https://github.com/electron-userland/electron-packager/blob/53e4606388829299d89c344a55e830d73324be93/index.js#L66

[develar]

@luixxiul Thanks, fixed (electron-userland/electron-builder@4241521).

[luixxiul]

@develar thanks!!

[posix4e]

#10633 <- Is pretty close it still needs

• To fix the icon
• To fix the sandbox in some platforms (although this can be a later issue i think)
• To fix the homepage