Don't advertise an update if the current OS can't install it

[stevenike]

Is your feature request related to a problem? Please describe. The menubar icon indicates an app update is available, but I can't install it because a later OS is required.

Describe the solution you'd like Don't show the update indicator if the currently installed OS can't install it.

Describe alternatives you've considered I can hide the menubar icon with Bartender, but the menu item is useful!

Additional context Sometimes a person needs to stick with an older OS for reasons...