Juju 3 is not supported

Attempting a deploy on my laptop, running the latest/stable Juju snap (3.2 at time of writing) gives:

2023-05-30 16:40:19 [ERROR] Unknown error
Traceback (most recent call last):
  File "/snap/mojo/141/lib/python3.6/site-packages/mojo/cli.py", line 692, in run_with_args
    args.func(args)
  File "/snap/mojo/141/lib/python3.6/site-packages/mojo/utils.py", line 389, in wrapped
    return method(*args, **kwargs)
  File "/snap/mojo/141/lib/python3.6/site-packages/mojo/cli.py", line 360, in run_from_manifest
    manifest.run(project, workspace, args.stage, args.interactive)
  File "/snap/mojo/141/lib/python3.6/site-packages/mojo/manifest.py", line 126, in run
    phase_name.run(project, workspace, stage)
  File "/snap/mojo/141/lib/python3.6/site-packages/mojo/phase.py", line 811, in run
    self._check_juju_version()
  File "/snap/mojo/141/lib/python3.6/site-packages/mojo/phase.py", line 1344, in _check_juju_version
    raise BundlePhaseException("Bundles require at least juju version 2.3+")
mojo.phase.BundlePhaseException: Bundles require at least juju version 2.3+

This is because the detection code here looks for both 2+ for the major version, and 3+ for the minor version - 3.2 actually supports everything we're trying to gate here, but the code doesn't know about it:

https://bazaar.launchpad.net/~mojo-maintainers/mojo/trunk/view/head:/mojo/phase.py#L1338