This PR fixes the failing presubmits to build this package in different
environments.

Note that the presubmits have been failing for a while. A better long
term solution is to switch the approach by building and testing against
the supported Python versions within a nox session.

Towards googleapis/librarian#2454

---------

Co-authored-by: Anthonios Partheniou <partheniou@google.com>

This PR puts the `version` under the right header. and adds the missing
info in pyproject.toml

PR created by the Librarian CLI to initialize a release. Merging this PR
will auto trigger a release.

Librarian Version: v0.7.0
Language Image:
us-central1-docker.pkg.dev/cloud-sdk-librarian-prod/images-prod/python-librarian-generator@sha256:e601da6e29c993e14c52867f2c088dfb841beae618d2a4f1e0f7970a888ab020
<details><summary>google-crc32c: 1.8.0</summary>

##
[1.8.0](v1.7.1...v1.8.0)
(2025-12-15)

### Features

* support Python 3.14 (#315)
([49d0a36](49d0a36f))

### Bug Fixes

* update toml file with setup.cfg content (#319)
([42e5268](42e5268c))

</details>

Temporarily restore release-please to release
#315

BEGIN_COMMIT_OVERRIDE
feat: add support for Python 3.14
END_COMMIT_OVERRIDE

🤖 I have created a release *beep* *boop*
---


##
[1.8.0](v1.7.1...v1.8.0)
(2025-12-15)


### Features

* Support Python 3.14
([#315](#315))
([49d0a36](49d0a36))


### Bug Fixes

* Update toml file with setup.cfg content
([#319](#319))
([42e5268](42e5268))

---
This PR was generated with [Release
Please](https://github.com/googleapis/release-please). See
[documentation](https://github.com/googleapis/release-please#release-please).

Co-authored-by: release-please[bot] <55107282+release-please[bot]@users.noreply.github.com>