cache_njit flag causing long run times on Windows w/ Python 3.11

[jrenaud90]

Had to set cache_njit=False in the test suite for the helper.py conversion functions (see this commit) due to very long run times for Windows when running Python 3.11. This behavior was new with the development of CyRK v0.8.3 and PR #39.

Very hard to debug the issue as it was not occurring on my local machine (also Win 10 & Py 3.11). Perhaps is is a different numba version or something like that. Did not look into the specific versions of dependencies. #a675494

[jrenaud90]

Welp. Looks like this was not the only problem. There is something up with these conversion tests and cyrk_ode. Sometimes they pass and the same exact test on the same commit will fail (see this fail and this pass on the same commit). The only consistency is that it is on windows and python 3.11.