Bug with nested Kleene quantifiers with graph cycles

[BeckySharp]

Describe the bug
When there are nested kleene quantifiers (+ and *) and corresponding cycles in the dependency graph, Odinson gets into an infinite loop...!

To Reproduce
Steps to reproduce the behavior:

1. Check out cycle_test branch
2. Run test: ai.lum.odinson.foundations.TestCycleHandling
3. Enjoy infinite loop, listen as your laptop fan starts up

Expected behavior
not an infinite loop! :)

Additional context
May seem like an esoteric issue, but fwiw I am dealing with it in a diff project where I'm using Odinson... plus infinite loops are generally bad :)