chore: update libp2p-pubsub

Author: vasco-santos

package.json

@@ -59,7 +59,7 @@
     "debug": "^4.1.1",
     "it-length-prefixed": "^3.0.0",
     "it-pipe": "^1.0.1",
-    "libp2p-pubsub": "~0.5.2",
+    "libp2p-pubsub": "~0.6.0",
     "p-map": "^4.0.0",
     "peer-id": "~0.14.0",
     "protons": "^2.0.0",