refactor(async): add dialer and upgrader (#462)

* chore(deps): update connection and multistream

* feat: add basic dial support for addresses and peers

* test: automatically require all node test files

* fix: dont catch and log in the wrong place

* test: add direct spec test

fix: improve dial error consistency

* feat: add dial timeouts and concurrency

Queue timeouts will result in aborts of the dials

* chore: fix linting

* test: verify dialer defaults

* feat: add initial upgrader

* fix: add more test coverage and fix bugs

* feat: libp2p creates the upgrader

* feat: hook up handle to the upgrader

* feat: hook up the dialer to libp2p

test: add node dialer libp2p tests

* feat: add connection listeners to upgrader

* feat: emit connect and disconnect events

* chore: use libp2p-interfaces

* fix: address review feedback

* fix: correct import

* refactor: dedupe connection creation code

src/circuit/README.md

@@ -1,6 +1,6 @@
 # js-libp2p-circuit
 
-> Node.js implementation of the Circuit module that libp2p uses, which implements the [interface-connection](https://github.com/libp2p/interface-connection) interface for dial/listen.
+> Node.js implementation of the Circuit module that libp2p uses, which implements the [interface-connection](https://github.com/libp2p/js-interfaces/tree/master/src/connection) interface for dial/listen.
 
 **Note**: git history prior to merging into js-libp2p can be found in the original repository, https://github.com/libp2p/js-libp2p-circuit.
 
@@ -24,15 +24,18 @@ Prior to `libp2p-circuit` there was a rift in the IPFS network, were IPFS nodes
 
 ## Table of Contents
 
-- [Install](#install)
-  - [npm](#npm)
-- [Usage](#usage)
-  - [Example](#example)
-  - [This module uses `pull-streams`](#this-module-uses-pull-streams)
-    - [Converting `pull-streams` to Node.js Streams](#converting-pull-streams-to-nodejs-streams)
-- [API](#api)
-- [Contribute](#contribute)
-- [License](#license)
+- [js-libp2p-circuit](#js-libp2p-circuit)
+    - [Why?](#why)
+    - [libp2p-circuit and IPFS](#libp2p-circuit-and-ipfs)
+  - [Table of Contents](#table-of-contents)
+  - [Usage](#usage)
+    - [Example](#example)
+      - [Create dialer/listener](#create-dialerlistener)
+      - [Create `relay`](#create-relay)
+    - [This module uses `pull-streams`](#this-module-uses-pull-streams)
+      - [Converting `pull-streams` to Node.js Streams](#converting-pull-streams-to-nodejs-streams)
+  - [API](#api)
+    - [Implementation rational](#implementation-rational)
 
 ## Usage
 

src/circuit/circuit/dialer.js

@@ -6,7 +6,7 @@ const waterfall = require('async/waterfall')
 const setImmediate = require('async/setImmediate')
 const multiaddr = require('multiaddr')
 
-const Connection = require('interface-connection').Connection
+const { Connection } = require('libp2p-interfaces/src/connection')
 
 const utilsFactory = require('./utils')
 const StreamHandler = require('./stream-handler')

src/circuit/circuit/stop.js

@@ -3,7 +3,7 @@
 const setImmediate = require('async/setImmediate')
 
 const EE = require('events').EventEmitter
-const Connection = require('interface-connection').Connection
+const { Connection } = require('libp2p-interfaces/src/connection')
 const utilsFactory = require('./utils')
 const PeerInfo = require('peer-info')
 const proto = require('../protocol').CircuitRelay