Arches error blocks manage.py if using dev/branch and not DEBUG

[whatisgalen]

If you install Arches on a dev branch like dev/7.6.x and try to run Arches with DEBUG = False it issues an error and prevents you from running any manage.py commands because the __version__ might look like this: "7.6.0-a10" which fails on arches>=7.6.0,<7.7.0. Instead, it should say something about how you're not running a stable version and issue a warning instead of an error. Relevant code here.

[jacobtylerwalls]

Hey @whatisgalen. I think this is failing because 7.6.0-a10 < 7.6.0 final, so it's failing your version requirement. Would recommend either loosening your version requirement to include dev versions, or if you prefer not to for some reason silencing the system check with SILENCED_SYSTEM_CHECKS.

The situation should be roughly the same as with the old MIN_ARCHES_VERSION check. Let me know if that helps.