Bump version to 0.1.21 (astral-sh#2457)

Bump version to v0.1.20 (astral-sh#2448)

Bump version to 0.1.19 (astral-sh#2435)

Bump version to v0.1.18 (astral-sh#2398)

Remove unnnecesary Windows stack size changes (astral-sh#2345)

This is already set by `command`.

Bump version to v0.1.16 (astral-sh#2289)

Pin maturin version in CI for now (astral-sh#2219)

## Summary

In v1.5.0, Maturin now produces Metadata 2.3.0, which isn't supported in
the GitHub Action:
pypa/gh-action-pypi-publish#219.

Bump version to v0.1.14 (astral-sh#2157)

Bump version to v0.1.13 (astral-sh#2090)

Bump version to v0.1.12 (astral-sh#2051)