Update Debian dependencies, fixes Ubuntu Groovy
Update Debian dependencies, fixes Ubuntu Groovy

Atom is not install-able on Ubuntu Groovy because of outdated dependencies as described in #21422 
This fixes and updates Atom dependencies after investigation with @DeeDeeG 
Some dependencies are not required by Electron anymore, some packages are unavailable/outdated and need alternatives
Some dependencies are less strict and can be a suggestion or recommendation. For details see bugreport #21422
brettle/atom,Mokolea/atom,Mokolea/atom,atom/atom,atom/atom,PKRoma/atom,Mokolea/atom,atom/atom,PKRoma/atom,brettle/atom,brettle/atom,PKRoma/atom