Bump version to v0.2.37 (astral-sh#6134)

Bump version to 0.2.36 (astral-sh#6060)

Bump version to 0.2.35 (astral-sh#5984)

Bump version to v0.2.34 (astral-sh#5889)

Bump version to 0.2.33 (astral-sh#5712)

Bump version to v0.2.32 (astral-sh#5641)

Bump version to v0.2.31 (astral-sh#5568)

Bump version to v0.2.30 (astral-sh#5486)

Normalize marker expression order (astral-sh#5422)

## Summary

Normalize the order of marker expressions on construction. This removes
the distinction between expressions like `os_name == 'Linux'` vs.
`'Linux' == os_name` throughout the codebase. One caveat here is that
the `in` operator does not have a direct inverse, so we introduce
`MarkerOperator::Contains` to handle that case.

I wanted to land this smaller change before some more intrusive changes
as it simplifies the existing code quite a bit.

Bump version to 0.2.28 (astral-sh#5363)