Allow disabling the update checker #755
Description
Is your feature request related to a problem? Please describe.
Objection appears to check for updates automatically. This is not helpful to me, as I install software through a package manager on a specific schedule except in emergencies. I prefer not to have any of my software making unnecessary network calls.
Describe the solution you'd like
An environment variable, command-line option, or other straightforward way that I can disable update checking when packaging Objection for my system's package manager.
Describe alternatives you've considered
I believe the alternative is I need to patch out Python code when packaging.
Additional context
See also #744, which makes the problem worse.