Release 0.2.16

* Update the build dependency on `vergen-git2`
* Drop dependency on `vergen-git2`

* Updated dependencies, fixes security advisories:
  * [RUSTSEC-2026-0008](https://rustsec.org/advisories/RUSTSEC-2026-0008.html)
  * [RUSTSEC-2026-0037](https://rustsec.org/advisories/RUSTSEC-2026-0037.html)