feat: prepare for new randomWalk config parameters

As per: https://github.com/libp2p/js-libp2p-kad-dht/issues/76

fix: pass whole dht config into DHT constructor

test/utils/bundle-nodejs.js

@@ -73,7 +73,9 @@ class Node extends libp2p {
         },
         dht: {
           kBucketSize: 20,
-          enabledDiscovery: true,
+          randomWalk: {
+            enabled: true
+          },
           enabled: true
         },
         EXPERIMENTAL: {