refactor(async): update transports subsystem (#461)

* test: remove all tests for a clean slate

The refactor will require a large number of updates to the tests. In order
to ensure we have done a decent deduplication, and have a cleaner suite of tests
we've removed all tests. This will also allow us to more easily see tests
for the refactored systems.

We have a record of the latest test suites in master, so we are not losing any history.

* chore: update tcp and websockets
* chore: remove other transports until they are converted
* chore: use mafmt and multiaddr async versions
* chore: add and fix dependencies
* chore: clean up travis file
* feat: add new transport manager
* docs: add constructor jsdocs
* refactor(config): check that transports exist
This also removes the other logic, it can be added when those subsystems are refactored

* chore(deps): use async peer-id and peer-info
* feat: wire up the transport manager with libp2p
* chore: remove superstruct dep

test/node.js

@@ -1,18 +1,3 @@
 'use strict'
 
-require('./pnet.node')
-require('./transports.node')
-require('./stream-muxing.node')
-require('./peer-discovery.node')
-require('./peer-routing.node')
-require('./ping.node')
-require('./promisify.node')
-require('./pubsub.node')
-require('./content-routing.node')
-require('./circuit-relay.node')
-require('./multiaddr-trim.node')
-require('./stats')
-require('./dht.node')
-
-require('./ping/node')
-require('./switch/node')
+require('./transports/transport-manager.node')