typo and changed deprecated method

go.mod

@@ -1,10 +1,9 @@
 module github.com/libp2p/go-libp2p-nat
 
+go 1.13
+
 require (
-	github.com/ipfs/go-log v0.0.1
-	github.com/jbenet/go-cienv v0.0.0-20150120210510-1bb1476777ec // indirect
-	github.com/jbenet/goprocess v0.0.0-20160826012719-b497e2f366b8
+	github.com/ipfs/go-log v1.0.1
+	github.com/jbenet/goprocess v0.1.3
 	github.com/libp2p/go-nat v0.0.4
 )
-
-go 1.13

go.sum

@@ -5,40 +5,45 @@ github.com/gogo/protobuf v1.2.1/go.mod h1:hp+jE20tsWTFYpLwKvXlhS1hjn+gTNwPg2I6zV
 github.com/huin/goupnp v1.0.0 h1:wg75sLpL6DZqwHQN6E1Cfk6mtfzS45z8OV+ic+DtHRo=
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-github.com/ipfs/go-log v0.0.1 h1:9XTUN/rW64BCG1YhPK9Hoy3q8nr4gOmHHBpgFdfw6Lc=
-github.com/ipfs/go-log v0.0.1/go.mod h1:kL1d2/hzSpI0thNYjiKfjanbVNU+IIGA/WnNESY9leM=
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nat.go

@@ -121,7 +121,7 @@ func (nat *NAT) rmMapping(m *mapping) {
 	nat.mappingmu.Unlock()
 }
 
-// NewMapping attemps to construct a mapping on protocol and internal port
+// NewMapping attempts to construct a mapping on protocol and internal port
 // It will also periodically renew the mapping until the returned Mapping
 // -- or its parent NAT -- is Closed.
 //
@@ -183,7 +183,7 @@ func (nat *NAT) establishMapping(m *mapping) {
 	if err != nil || newport == 0 {
 		m.setExternalPort(0) // clear mapping
 		// TODO: log.Event
-		log.Warningf("failed to establish port mapping: %s", err)
+		log.Warnf("failed to establish port mapping: %s", err)
 		// we do not close if the mapping failed,
 		// because it may work again next time.
 		return