Update versioneer

[jorisvandenbossche]

Re-run versioneer install --vendor with the latest version of versioneer.

In addition also updated pre-commit to ignore top-level files (but only the package code itself). If we move config later for black/ruff we might make this smarter, but for now I want to avoid running black on the vendored versioneer.py file

And updating the release workflow to also run on the main branch

[jorisvandenbossche]

This is a simple update, so going to merge this as it is blocking other PRs like https://github.com/geopandas/dask-geopandas/pull/271