Log Message:
service_identity: update to 23.1.0.

## [23.1.0](https://github.com/pyca/service-identity/compare/21.1.0...23.1.0) - \ 
2023-06-14

### Removed

- All Python versions up to and including 3.7 have been dropped.
- Support for `commonName` in certificates has been dropped.
  It has been deprecated since 2017 and isn't supported by any major browser.
- The oldest supported pyOpenSSL version (when using the `pyopenssl` backend) is \ 
now 17.0.0.
  When using such an old pyOpenSSL version, you have to pin *cryptography* \ 
yourself to ensure compatibility between them.
  Please check out \ 
[`contraints/oldest-pyopenssl.txt`](https://github.com/pyca/service-identity/blob/main/tests/constraints/oldest-pyopenssl.txt) \ 
to verify what we are testing against.

### Deprecated

- If you've used `service_identity.(cryptography|pyopenssl).extract_ids()`, \ 
please switch to the new names `extract_patterns()`.
  [#56](https://github.com/pyca/service-identity/pull/56)

### Added

- `service_identity.(cryptography|pyopenssl).extract_patterns()` are now public \ 
APIs (FKA `extract_ids()`).
  You can use them to extract the patterns from a certificate without verifying \ 
anything.
  [#55](https://github.com/pyca/service-identity/pull/55)
- *service-identity* is now fully typed.
  [#57](https://github.com/pyca/service-identity/pull/57)