Add dependencies to deb file

[ArturKovacs]

Currently we generate the deb file using cargo bundle which seems to have an option to specify the dependencies. The dependencies of emulsion are libGL, libX11, libXcursor, libXi, libXrandr, libXxf86vm, libxcb, libxkbcommon, wayland. But there may be others (it's been a while I last tested that Nix expression).

[ArturKovacs]

We will probably want to do some custom changes on the Info.plist file on macOS once handling "file open events" become possible with winit, so it's worth considering to stop using cargo bundle and use a custom build script for generating the deb file as well.