Configure libp2p gossipsub WithDirectPeers

[snormore]

Attempt to mitigate #291 with https://github.com/libp2p/go-libp2p-pubsub/blob/master/gossipsub.go#L353-L379

WithDirectPeers is a gossipsub router option that specifies peers with direct
peering agreements. These peers are connected outside of the mesh, with all (valid)
message unconditionally forwarded to them. The router will maintain open connections
to these peers. Note that the peering agreement should be reciprocal with direct peers
symmetrically configured at both ends.

[neekolas]

Why don't we try this in dev first and make sure it doesn't blow anything up