₴Ⱡ33₱

Update mesh-specifications to v1.4.15

2

**Is your feature request related to a problem? Please describe.** `mesh-sdk-go` currently lacks support for Bitcoin's [BIP-340](https://github.com/bitcoin/bips/blob/master/bip-0340.mediawiki) Schnorr Signature scheme, which is vital for aligning with modern Bitcoin standards and...