docs: add missing commas to readme example (#216)

Author: mkg20001

README.md

@@ -119,7 +119,7 @@ const defaultsDeep = require('@nodeutils/defaults-deep')
 class Node extends libp2p {
   constructor (_peerInfo, _peerBook, _options) {
     const defaults = {
-      peerInfo: _peerInfo             // The Identity of your Peer
+      peerInfo: _peerInfo,            // The Identity of your Peer
       peerBook: _peerBook,            // Where peers get tracked, if undefined libp2p will create one instance
 
       // The libp2p modules for this libp2p bundle
@@ -134,12 +134,12 @@ class Node extends libp2p {
         ],
         connEncryption: [
           SECIO
-        ]
+        ],
         peerDiscovery: [
           MulticastDNS
         ],
         peerRouting: {},              // Currently both peerRouting and contentRouting are patched through the DHT,
-        contentRouting: {}            // this will change once we factor that into two modules, for now do the following line:
+        contentRouting: {},           // this will change once we factor that into two modules, for now do the following line:
         dht: DHT                      // DHT enables PeerRouting, ContentRouting and DHT itself components
       },
 
@@ -164,13 +164,13 @@ class Node extends libp2p {
             enabled: false,
             active: false
           }
-        }
+        },
         // Enable/Disable Experimental features
         EXPERIMENTAL: {               // Experimental features ("behind a flag")
           pubsub: false,
           dht: false
         }
-      },
+      }
     }
 
     // overload any defaults of your bundle using https://github.com/nodeutils/defaults-deep