chore(pkg): upgrade go.mod (k8s api;etcd clientv3)

Author: lijianguo

go.mod

@@ -5,27 +5,16 @@ go 1.13
 require (
 	github.com/Masterminds/cookoo v1.3.0
 	github.com/arschles/assert v1.0.0
-	github.com/coreos/etcd v2.3.8+incompatible
-	github.com/gogo/protobuf v1.2.0 // indirect
-	github.com/google/btree v1.0.0 // indirect
-	github.com/google/gofuzz v0.0.0-20170612174753-24818f796faf // indirect
+	github.com/coreos/etcd v3.3.22+incompatible
+	github.com/coreos/go-semver v0.3.0 // indirect
+	github.com/coreos/go-systemd v0.0.0-20191104093116-d3cd4ed1dbcf // indirect
+	github.com/coreos/pkg v0.0.0-20180928190104-399ea9e2e55f // indirect
 	github.com/googleapis/gnostic v0.2.0 // indirect
 	github.com/gregjones/httpcache v0.0.0-20181110185634-c63ab54fda8f // indirect
-	github.com/json-iterator/go v1.1.5 // indirect
-	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
-	github.com/modern-go/reflect2 v0.0.0-20180701023420-4b7aa43c6742 // indirect
 	github.com/petar/GoLLRB v0.0.0-20130427215148-53be0d36a84c // indirect
-	github.com/peterbourgon/diskv v2.0.1+incompatible // indirect
-	golang.org/x/crypto v0.0.0-20180802221240-56440b844dfe // indirect
-	golang.org/x/net v0.0.0-20190119204137-ed066c81e75e
-	golang.org/x/oauth2 v0.0.0-20190115181402-5dab4167f31c // indirect
-	golang.org/x/sys v0.0.0-20180810173357-98c5dad5d1a0 // indirect
-	golang.org/x/time v0.0.0-20181108054448-85acf8d2951c // indirect
-	gopkg.in/inf.v0 v0.9.1 // indirect
-	gopkg.in/yaml.v2 v2.2.2 // indirect
-	k8s.io/api v0.0.0-20181221193117-173ce66c1e39
-	k8s.io/apimachinery v0.0.0-20190119020841-d41becfba9ee
-	k8s.io/client-go v10.0.0+incompatible
-	k8s.io/klog v0.1.0 // indirect
-	sigs.k8s.io/yaml v1.1.0 // indirect
+	go.uber.org/zap v1.15.0 // indirect
+	golang.org/x/net v0.0.0-20191004110552-13f9640d40b9
+	k8s.io/api v0.18.6
+	k8s.io/apimachinery v0.18.6
+	k8s.io/client-go v0.18.6
 )