v21.0.0

• Breaking: Drop support for Python 3.8
• Add support for Python 3.13
• Remove all runtime dependencies (cffi & asn1crypto)
• Add COINCURVE_VENDOR_CFFI environment variable to control vendoring of the _cffi_backend module
• Minor performance improvement by removing use of formatted string constants
• Upgrade libsecp256k1 to version 0.6.0

v20.0.0

• Breaking: CMake is now a build dependency; this is only a breaking change for redistributors as building with standard Python packaging tools will automatically use the CMake that is available on PyPI
• Breaking: Stop building wheels for Windows 32-bit
• Build wheels for Windows ARM64

v19.0.1

• Fix regression in Windows wheels

v19.0.0

• Breaking: Drop support for Python 3.7
• Add support for Python 3.12
• Upgrade libsecp256k1 to version 0.4.1

v18.0.0

• Support Schnorr signatures
• Add support for Python 3.11
• Upgrade libsecp256k1 to the latest available version

v17.0.0

• Breaking: Drop support for Python 3.6
• Fix wheels for Apple M1
• Upgrade libsecp256k1 to the latest available version