Merge #1713

1713: Implement a libp2p transport r=thomaseizinger a=tcharding

Cut n paste the code out of libp2p stripping unnecessary complexity.  In other words implement a transport that is functionally identical to the one we are currently using (`libp2p::build_development_transport`).

Initial patch updates libp2p from 0.12 -> 0.13 and libp2p-swarm from 0.2 -> 0.3

Resolves: #1547 

Co-authored-by: Tobin C. Harding <[email protected]>

Author: bors[bot]