v0.2.6 release

This release contains one bugfix(b68828b) and passed test with Ruby 3.0 environment.

v0.2.5 release

Add utility methods Script#color?, Script#color_id, Script#remove_color.

v0.2.4 release

Fix schnorr signature generation bug using libsecp256k1 which sometimes return invalid length signature.

v0.2.3 release

Release to improve performance for signature generation and verification.

• Tapyrus::Key now supports fast public key verification using libsecp256k1
• Supports Schnorr signature generation and validation using libsecp256k1