There's a merged pull request on the void-packages repository

alembic: update to 1.8.4.
https://github.com/void-linux/void-packages/pull/41667

Description:
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#### Testing the changes
- I tested the changes in this PR: **YES**


```
SUMMARY
pkg      host         target        cross  result
alembic  x86_64       x86_64        n      OK
alembic  x86_64-musl  x86_64-musl   n      OK
alembic  i686         i686          n      OK
alembic  x86_64-musl  aarch64-musl  y      OK
alembic  x86_64-musl  aarch64       y      OK
alembic  x86_64-musl  armv7l-musl   y      OK
alembic  x86_64-musl  armv7l        y      OK
alembic  x86_64-musl  armv6l-musl   y      OK
alembic  x86_64-musl  armv6l        y      OK
```