Release v4.0.996-152-pre

bugfix: fix `makeSingleInstance is not a function`

the method was deprecated in electron 4.x.

remove the icon as `/public/favicon.png` cannot be found.

set autoHideMenuBar to false so that users can close the window even
when the window is blank for some reason.

Release v4.0.996-150-pre

bugfix: rebuild native binaries

Release v4.0.996-149-pre

bugfix: rebuild native binaries

Release v4.0.996-148-pre

fixup

Release v4.0.996-147-pre

doc: update the requirements

Release v4.0.996-146-pre

doc: document the release process

Release v4.0.996-145-pre

ci: add ubuntu to matrix