* Add peer lifetime feature for PeerInfo.
Refactor peerinfo to use openarrays instead of sequences.
Fix tests and examples to use arrays instead of sequences.
* Add access to lifetime Future[T] itself.
* fix: don't allow replacing pubkey
* fix: several small improvements
* removing pubkey setter
* improove error handling
* remove the use of Option[T] if not needed
* don't use optional
* fix-ci: temporarily pin p2pd to a working tag
* fix example to comply with latest changes
* bumping p2pd again to a higher version
* extract public and private keys fields from peerid
* allow assigning a public key
* cleaned up TODOs
* make pubsub prefix a const
* public key should be an `Option`