chore(package): update libp2p-floodsub to version 0.18.0 (#2435)

Author: greenkeeper[bot]

package.json

@@ -126,7 +126,7 @@
     "libp2p-crypto": "~0.16.0",
     "libp2p-delegated-content-routing": "^0.2.4",
     "libp2p-delegated-peer-routing": "^0.2.4",
-    "libp2p-floodsub": "^0.17.2",
+    "libp2p-floodsub": "^0.18.0",
     "libp2p-gossipsub": "~0.0.5",
     "libp2p-kad-dht": "~0.15.3",
     "libp2p-keychain": "~0.4.2",