Release 0.15.12

What's Changed

• Set OPENSSL_ROOT_DIR so find_package(OpenSSL) works by @mrexodia in #107
• Upgrade manylinux image by @martinRenou in #117
• Build wheel for Python 3.12 by @martinRenou in #118
• Release 0.15.12 by @martinRenou in #119

New Contributors

• @mrexodia made their first contribution in #107

Full Changelog: 0.15.11...0.15.12