chore: update deps

go.mod

@@ -3,11 +3,11 @@ module github.com/libp2p/go-libp2p-discovery
 require (
 	github.com/hashicorp/golang-lru v0.5.4
 	github.com/ipfs/go-cid v0.0.5
-	github.com/ipfs/go-log v1.0.2
+	github.com/ipfs/go-log v1.0.3
 	github.com/libp2p/go-libp2p-blankhost v0.1.4
-	github.com/libp2p/go-libp2p-core v0.3.0
-	github.com/libp2p/go-libp2p-peerstore v0.2.1
-	github.com/libp2p/go-libp2p-swarm v0.2.2
+	github.com/libp2p/go-libp2p-core v0.5.1
+	github.com/libp2p/go-libp2p-peerstore v0.2.2
+	github.com/libp2p/go-libp2p-swarm v0.2.3
 	github.com/multiformats/go-multihash v0.0.13
 )