chore: address review

.travis.yml

@@ -1,5 +1,5 @@
 language: node_js
-cache: npm
+cache: false
 stages:
   - check
   - test

package.json

@@ -92,7 +92,7 @@
     "libp2p-delegated-content-routing": "^0.2.2",
     "libp2p-delegated-peer-routing": "^0.2.2",
     "libp2p-floodsub": "^0.19.0",
-    "libp2p-gossipsub": "ChainSafe/gossipsub-js#refactor/async",
+    "libp2p-gossipsub": "ChainSafe/gossipsub-js#beta/async",
     "libp2p-kad-dht": "^0.15.3",
     "libp2p-mdns": "^0.12.3",
     "libp2p-mplex": "^0.9.1",

src/registrar.js

@@ -6,7 +6,6 @@ const log = debug('libp2p:peer-store')
 log.error = debug('libp2p:peer-store:error')
 
 const Topology = require('libp2p-interfaces/src/topology')
-const MulticodecTopology = require('libp2p-interfaces/src/topology/multicodec-topology')
 const { Connection } = require('libp2p-interfaces/src/connection')
 const PeerInfo = require('peer-info')
 
@@ -112,8 +111,7 @@ class Registrar {
    */
   register (topology) {
     assert(
-      Topology.isTopology(topology) ||
-      MulticodecTopology.isMulticodecTopology(topology),
+      Topology.isTopology(topology),
       'topology must be an instance of interfaces/topology')
 
     // Create topology