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/dialing/direct.spec.js

@@ -218,5 +218,28 @@ describe('Dialing (direct, WebSockets)', () => {
       await connection.close()
       expect(libp2p.dialer.connectToMultiaddr.callCount).to.equal(1)
     })
+
+    it('should run identify automatically after connecting', async () => {
+      libp2p = new Libp2p({
+        peerInfo,
+        modules: {
+          transport: [Transport],
+          streamMuxer: [Muxer],
+          connEncryption: [Crypto]
+        }
+      })
+
+      sinon.spy(libp2p.dialer.identifyService, 'identify')
+      sinon.spy(libp2p.peerStore, 'update')
+
+      const connection = await libp2p.dialer.connectToMultiaddr(remoteAddr)
+      expect(connection).to.exist()
+      // Wait for setImmediate to trigger the identify call
+      await delay(1)
+      expect(libp2p.dialer.identifyService.identify.callCount).to.equal(1)
+      await libp2p.dialer.identifyService.identify.firstCall.returnValue
+
+      expect(libp2p.peerStore.update.callCount).to.equal(1)
+    })
   })
 })