Converts a NAJ public key to an uncompressed SEC1 public key.
The NAJ public key to convert (e.g. secp256k1:3Ww8iFjqTHufye5aRGUvrQqETegR4gVUcW8FX5xzscaN9ENhpkffojsxJwi6N1RbbHMTxYa9UyKeqK3fsMuwxjR5)
The uncompressed SEC1 public key (e.g. 04 || x || y)
Converts a NAJ public key to an uncompressed SEC1 public key.