* Changes for the next libp2p release:
* Updates to the Kademlia APIs.
* Updated imports due to the extracted libp2p-swarm crate.
* ...
Still pending at least the following:
* rust-libp2p/#1189
* rust-libp2p/#1191
* rust-libp2p/#1194
* Use Quorum::One.
The previous choice was apparently arbitrary.
* Use libp2p-0.11 from crates.io. Address feedback.
* Correct imports after merge.