v2.12.1

• Important Removed mnemonicToSeed, it is only for bip39, use mnemonicToMiniSecret for the Substrate variant
• Added u8aEq to compare two Uint8Array or hex values for an exact match
• Added addressEq to compare two addresses (ss58, Uint8array or hex) for an exact match
• Throw error on {nacl,schnorrkel}Verify on invalid input lengths
• Performance optimizations in u8aToHex & u8aConcat