chore: update libp2p to final release version

examples/custom-libp2p/package.json

@@ -11,7 +11,7 @@
   "license": "MIT",
   "dependencies": {
     "ipfs": "^0.54.4",
-    "libp2p": "^0.31.0-rc.6",
+    "libp2p": "^0.31.0",
     "libp2p-bootstrap": "^0.12.3",
     "libp2p-kad-dht": "libp2p/js-libp2p-kad-dht#chore/update-deps-12-04-2021",
     "libp2p-mdns": "^0.16.0",

packages/ipfs-core/package.json

@@ -94,7 +94,7 @@
     "it-map": "^1.0.4",
     "it-pipe": "^1.1.0",
     "just-safe-set": "^2.2.1",
-    "libp2p": "^0.31.0-rc.6",
+    "libp2p": "^0.31.0",
     "libp2p-bootstrap": "^0.12.3",
     "libp2p-crypto": "^0.19.3",
     "libp2p-floodsub": "^0.25.1",

packages/ipfs-daemon/package.json

@@ -40,7 +40,7 @@
     "ipfs-http-server": "^0.3.4",
     "ipfs-utils": "^6.0.4",
     "just-safe-set": "^2.2.1",
-    "libp2p": "^0.31.0-rc.6",
+    "libp2p": "^0.31.0",
     "libp2p-delegated-content-routing": "^0.10.0",
     "libp2p-delegated-peer-routing": "^0.9.0",
     "libp2p-webrtc-star": "^0.22.2",