Bugfixes --- - Update from deprecated pyOpenSSL APIs to non-deprecated cryptography APIs. (https://github.com/python-trio/trustme/issues/670)

## Features - Allow `os.PathLike` in typing of `Blob.write_to_path`. [#606](https://github.com/python-trio/trustme/issues/606>) - Add support for PyPy 3.10 and Python 3.12. [#609](https://github.com/python-trio/trustme/issues/609) ## Deprecations and Removals - Remove support for Python 3.7. [#609](https://github.com/python-trio/trustme/issues/609>)

## Features * Add support for Python 3.13. (#664) * Allow setting of cert's notBefore attribute (#628) ## Bugfixes * Add the Authority Key Identifier extension to child CA certificates. (#642) ## Deprecations and Removals * Remove support for Python 3.8 and PyPy 3.9. (#664)