6eceec6d56add `secp256k1_xonly_pubkey_cmp` method (Andrew Poelstra)0d9561ae87add `secp256k1_ec_pubkey_cmp` method (Andrew Poelstra) Pull request description: ACKs for top commit: elichai: Code review ACK6eceec6d56jonasnick: ACK6eceec6d56real-or-random: ACK6eceec6d56Tree-SHA512: f95cbf65f16c88a4adfa1ea7cc6ddabab14baa3b68fa069e78e6faad4852cdbfaea42ee72590d2e0b8f3159cf9b37969511550eb6b2d256b101e2147711cc817