Remove dep on cMix hash
When xx/id was first created, it relied on the existing cMix hash object, which is blake2b under the hood and subject to change. We remove that dependency and use blake2b more explicitly here.
When xx/id was first created, it relied on the existing cMix hash object, which is blake2b under the hood and subject to change. We remove that dependency and use blake2b more explicitly here.