move-to-next-monitor issue w/ gnome-shell 3.30.1

[frostidaho]

move-to-next-monitor does not work on my system

• gnome-shell v 3.30.1
• gnomesome v 6

Here is some debugging info

[gnomesome] start action: handler for binding move-to-next-monitor
[gnomesome] Uncaught error in handler for binding move-to-next-monitor: TypeError: Utils.DisplayWrapper.getMonitorManager(...).get_n_monitors is not a function
roll_move_to_monitor@/home/ida/.local/share/gnome-shell/extensions/gnomesome@chwick.github.com/manager.js:423:26
wrapper@resource:///org/gnome/gjs/modules/_legacy.js:82:22
initKeyBindings/<@/home/ida/.local/share/gnome-shell/extensions/gnomesome@chwick.github.com/manager.js:117:80
_do@/home/ida/.local/share/gnome-shell/extensions/gnomesome@chwick.github.com/manager.js:250:13
wrapper@resource:///org/gnome/gjs/modules/_legacy.js:82:22
handleKey/added<@/home/ida/.local/share/gnome-shell/extensions/gnomesome@chwick.github.com/manager.js:225:41

[ChWick]

Fixed by #16