dep: update go-libp2p-swarm

Fixes a race condition when a user modifies the address list returned by InterfaceListenAddresses.

go.mod

@@ -21,7 +21,7 @@ require (
 	github.com/libp2p/go-libp2p-netutil v0.1.0
 	github.com/libp2p/go-libp2p-peerstore v0.1.3
 	github.com/libp2p/go-libp2p-secio v0.2.0
-	github.com/libp2p/go-libp2p-swarm v0.2.0
+	github.com/libp2p/go-libp2p-swarm v0.2.1
 	github.com/libp2p/go-libp2p-testing v0.1.0
 	github.com/libp2p/go-libp2p-transport-upgrader v0.1.1
 	github.com/libp2p/go-libp2p-yamux v0.2.1

go.sum

@@ -148,8 +148,8 @@ github.com/libp2p/go-libp2p-secio v0.1.0/go.mod h1:tMJo2w7h3+wN4pgU2LSYeiKPrfqBg
 github.com/libp2p/go-libp2p-secio v0.2.0 h1:ywzZBsWEEz2KNTn5RtzauEDq5RFEefPsttXYwAWqHng=
 github.com/libp2p/go-libp2p-secio v0.2.0/go.mod h1:2JdZepB8J5V9mBp79BmwsaPQhRPNN2NrnB2lKQcdy6g=
 github.com/libp2p/go-libp2p-swarm v0.1.0/go.mod h1:wQVsCdjsuZoc730CgOvh5ox6K8evllckjebkdiY5ta4=
-github.com/libp2p/go-libp2p-swarm v0.2.0 h1:gUqj9WYFC9mQ6khEtO5EjfaAtevwBMxsXRARbi6lAiI=
-github.com/libp2p/go-libp2p-swarm v0.2.0/go.mod h1:x07b4zkMFo2EvgPV2bMTlNmdQc8i+74Jjio7xGvsTgU=
+github.com/libp2p/go-libp2p-swarm v0.2.1 h1:9A8oQqPIZvbaRyrjViHeDYS7fE7fNtP7BRWdJrBHbe8=
+github.com/libp2p/go-libp2p-swarm v0.2.1/go.mod h1:x07b4zkMFo2EvgPV2bMTlNmdQc8i+74Jjio7xGvsTgU=
 github.com/libp2p/go-libp2p-testing v0.0.2/go.mod h1:gvchhf3FQOtBdr+eFUABet5a4MBLK8jM3V4Zghvmi+E=
 github.com/libp2p/go-libp2p-testing v0.0.3/go.mod h1:gvchhf3FQOtBdr+eFUABet5a4MBLK8jM3V4Zghvmi+E=
 github.com/libp2p/go-libp2p-testing v0.0.4 h1:Qev57UR47GcLPXWjrunv5aLIQGO4n9mhI/8/EIrEEFc=