fix(package): update libp2p-kad-dht to version 0.18.1

Closes #2640

Author: greenkeeper[bot]

package.json

@@ -137,7 +137,7 @@
     "libp2p-delegated-peer-routing": "^0.3.1",
     "libp2p-floodsub": "^0.18.0",
     "libp2p-gossipsub": "~0.0.5",
-    "libp2p-kad-dht": "~0.16.0",
+    "libp2p-kad-dht": "~0.18.1",
     "libp2p-keychain": "^0.5.2",
     "libp2p-mdns": "~0.12.0",
     "libp2p-record": "~0.7.0",