Bring back numba handling the M step

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 75.00000% with 5 lines in your changes are missing coverage. Please review.

Project coverage is 68.92%. Comparing base (9418293) to head (57e7d8c).

Files	Patch %	Lines
lineage/states/stateCommon.py	61.53%	5 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #997 +/- ## ========================================== - Coverage 69.30% 68.92% -0.38% ========================================== Files 28 28 Lines 1919 1931 +12 ========================================== + Hits 1330 1331 +1 - Misses 589 600 +11 ``` | [Flag](https://app.codecov.io/gh/meyer-lab/tHMM/pull/997/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=meyer-lab) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/meyer-lab/tHMM/pull/997/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=meyer-lab) | `68.92% <75.00%> (-0.38%)` | :arrow_down: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=meyer-lab#carryforward-flags-in-the-pull-request-comment) to find out more.

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