Fix Python 3.12 issues

[gabeclasson]

There are some issues with the ok-client and Python 3.12. Students have found that it just doesn't work. Here's a list of things we need to do

• [x] Allow the Ok client to be used with Python 3.12
  • [x] Replace deprecated packages/things incompatible with 3.12
  • [x] urllib.package.six.moves
  • [ ] colorama may be broken, this requires investigation
  • [ ] Ensure backward compatibility (to what version of Python?)
  • [ ] Test
  • [x] Unit tests.
  • [ ] Test a real version of the client.
• [ ] Allow the Ok client to be developed with Python 3.12
  • [ ] Replace deprecated packages/things incompatible with 3.12

[gabeclasson]

Seems that pytutor is breaking some things. Given that the trace functionality is already broken, I am inclined to just defer on this for now

[cycomachead]

3.7 is deprecated, I'd suggest tests run on 3.10-3.12, or maybe even 3.9-3.12

[cycomachead]

Thanks for starting this! Merged in #487 :)