ID() method on connections and streams + record opening time (#224)

Co-authored-by: Aarsh Shah <aarshkshah1992@gmail.com>
Co-authored-by: Raúl Kripalani <raul@protocol.ai>

go.mod

@@ -1,27 +1,26 @@
 module github.com/libp2p/go-libp2p-swarm
 
+go 1.12
+
 require (
  github.com/ipfs/go-log v1.0.4
  github.com/jbenet/goprocess v0.1.4
  github.com/libp2p/go-addr-util v0.0.2
  github.com/libp2p/go-conn-security-multistream v0.2.0
- github.com/libp2p/go-libp2p-circuit v0.2.2
- github.com/libp2p/go-libp2p-core v0.5.6
+ github.com/libp2p/go-libp2p-circuit v0.2.3
+ github.com/libp2p/go-libp2p-core v0.6.0
  github.com/libp2p/go-libp2p-loggables v0.1.0
  github.com/libp2p/go-libp2p-peerstore v0.2.4
- github.com/libp2p/go-libp2p-pubsub v0.3.1
- github.com/libp2p/go-libp2p-quic-transport v0.3.7
+ github.com/libp2p/go-libp2p-quic-transport v0.5.0
  github.com/libp2p/go-libp2p-secio v0.2.2
  github.com/libp2p/go-libp2p-testing v0.1.1
  github.com/libp2p/go-libp2p-transport-upgrader v0.3.0
- github.com/libp2p/go-libp2p-yamux v0.2.7
+ github.com/libp2p/go-libp2p-yamux v0.2.8
  github.com/libp2p/go-stream-muxer-multistream v0.3.0
  github.com/libp2p/go-tcp-transport v0.2.0
  github.com/multiformats/go-multiaddr v0.2.2
  github.com/multiformats/go-multiaddr-fmt v0.1.0
  github.com/multiformats/go-multiaddr-net v0.1.5
- github.com/stretchr/testify v1.4.0
+ github.com/stretchr/testify v1.6.0
  github.com/whyrusleeping/multiaddr-filter v0.0.0-20160516205228-e903e4adabd7
 )
-
-go 1.12