refactor: API changes and switch to async iterators (#29)

BREAKING CHANGE: all the callbacks in the provided API were removed and each function uses async/await. Additionally, pull-streams are no longer being used. See the README for new usage.

test/compliance.spec.js

@@ -0,0 +1,59 @@
+/* eslint-env mocha */
+'use strict'
+
+const tests = require('../src/tests')
+const Connection = require('../src/connection')
+const peers = require('./utils/peers')
+const PeerId = require('peer-id')
+const multiaddr = require('multiaddr')
+const pair = require('it-pair')
+
+describe('compliance tests', () => {
+  tests({
+    async setup () {
+      const localAddr = multiaddr('/ip4/127.0.0.1/tcp/8080')
+      const remoteAddr = multiaddr('/ip4/127.0.0.1/tcp/8081')
+      const [localPeer, remotePeer] = await Promise.all([
+        PeerId.createFromJSON(peers[0]),
+        PeerId.createFromJSON(peers[1])
+      ])
+      const openStreams = []
+      let streamId = 0
+
+      return new Connection({
+        localPeer,
+        remotePeer,
+        localAddr,
+        remoteAddr,
+        stat: {
+          timeline: {
+            open: Date.now() - 10,
+            upgraded: Date.now()
+          },
+          direction: 'outbound',
+          encryption: '/secio/1.0.0',
+          multiplexer: '/mplex/6.7.0'
+        },
+        newStream: (protocols) => {
+          const id = streamId++
+          const stream = pair()
+
+          stream.close = () => stream.sink([])
+          stream.id = id
+
+          openStreams.push(stream)
+
+          return {
+            stream,
+            protocol: protocols[0]
+          }
+        },
+        close: () => {},
+        getStreams: () => openStreams
+      })
+    },
+    async teardown () {
+      // cleanup resources created by setup()
+    }
+  })
+})