fix: add connect call

Author: daviddias

src/pubsub.js

@@ -257,6 +257,14 @@ module.exports = (common) => {
       })
 
       describe('multiple nodes', () => {
+        before((done) => {
+          ipfs2.id((err, id) => {
+            expect(err).to.not.exist
+            const ipfs2Addr = id.addresses[0]
+            ipfs1.swarm.connect(ipfs2Addr, done)
+          })
+        })
+
         it('receive messages from different node', (done) => {
           const expectedString = 'hello from the other side'