refactor: async identify and identify push (#473)

* chore: add missing dep

* feat: import from identify push branch

https://github.com/libp2p/js-libp2p-identify/tree/feat/identify-push

* feat: add the connection to stream handlers

* refactor: identify to async/await

* chore: fix lint

* test: add identify tests

* refactor: add identify to the dialer flow

* feat: connect identify to the registrar

* fix: resolve review feedback

* fix: perform identify push when our protocols change

test/utils/base-options.browser.js

@@ -0,0 +1,13 @@
+'use strict'
+
+const Transport = require('libp2p-websockets')
+const Muxer = require('libp2p-mplex')
+const Crypto = require('../../src/insecure/plaintext')
+
+module.exports = {
+  modules: {
+    transport: [Transport],
+    streamMuxer: [Muxer],
+    connEncryption: [Crypto]
+  }
+}