Implement alifestd prune extinct taxa helper

[codecov[bot]]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (00c65e8) 97.53% compared to head (d7a46ed) 97.54%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #124 +/- ## ======================================= Coverage 97.53% 97.54% ======================================= Files 595 596 +1 Lines 7918 7945 +27 ======================================= + Hits 7723 7750 +27 Misses 195 195 ``` | [Flag](https://app.codecov.io/gh/mmore500/hstrat/pull/124/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Matthew+Andres+Moreno) | Coverage Δ | | |---|---|---| | [tests](https://app.codecov.io/gh/mmore500/hstrat/pull/124/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Matthew+Andres+Moreno) | `97.54% <100.00%> (+<0.01%)` | :arrow_up: | 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=Matthew+Andres+Moreno#carryforward-flags-in-the-pull-request-comment) to find out more. | [Files Changed](https://app.codecov.io/gh/mmore500/hstrat/pull/124?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Matthew+Andres+Moreno) | Coverage Δ | | |---|---|---| | [hstrat/\_auxiliary\_lib/\_\_init\_\_.py](https://app.codecov.io/gh/mmore500/hstrat/pull/124?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Matthew+Andres+Moreno#diff-aHN0cmF0L19hdXhpbGlhcnlfbGliL19faW5pdF9fLnB5) | `100.00% <100.00%> (ø)` | | | [...ry\_lib/\_alifestd\_prune\_extinct\_lineages\_asexual.py](https://app.codecov.io/gh/mmore500/hstrat/pull/124?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Matthew+Andres+Moreno#diff-aHN0cmF0L19hdXhpbGlhcnlfbGliL19hbGlmZXN0ZF9wcnVuZV9leHRpbmN0X2xpbmVhZ2VzX2FzZXh1YWwucHk=) | `100.00% <100.00%> (ø)` | | | [...\_auxiliary\_lib/\_alifestd\_unfurl\_lineage\_asexual.py](https://app.codecov.io/gh/mmore500/hstrat/pull/124?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Matthew+Andres+Moreno#diff-aHN0cmF0L19hdXhpbGlhcnlfbGliL19hbGlmZXN0ZF91bmZ1cmxfbGluZWFnZV9hc2V4dWFsLnB5) | `100.00% <100.00%> (ø)` | |

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