Manually update client-go to v0.18.6 (#4015)

This PR manually update  client-go to v0.18.6 as dependabot
had trouble and was stuck in PR #4010 and #4013.

This PR closes #4010
This PR closes #4013
Signed-off-by: Yong Tang <yong.tang.github@outlook.com>

go.mod

@@ -38,8 +38,8 @@ require (
 	google.golang.org/api v0.29.0
 	google.golang.org/grpc v1.29.1
 	gopkg.in/DataDog/dd-trace-go.v1 v1.25.0
-	k8s.io/api v0.18.5
+	k8s.io/api v0.18.6
 	k8s.io/apimachinery v0.18.6
-	k8s.io/client-go v0.18.5
+	k8s.io/client-go v0.18.6
 	k8s.io/klog v1.0.0
 )

go.sum

@@ -774,13 +774,12 @@ honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWh
 honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
 honnef.co/go/tools v0.0.1-2020.1.3 h1:sXmLre5bzIR6ypkjXCDI3jHPssRhc8KD/Ome589sc3U=
 honnef.co/go/tools v0.0.1-2020.1.3/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
-k8s.io/api v0.18.5 h1:fKbCxr+U3fu7k6jB+QeYPD/c6xKYeSJ2KVWmyUypuWM=
-k8s.io/api v0.18.5/go.mod h1:tN+e/2nbdGKOAH55NMV8oGrMG+3uRlA9GaRfvnCCSNk=
-k8s.io/apimachinery v0.18.5/go.mod h1:OaXp26zu/5J7p0f92ASynJa1pZo06YlV9fG7BoWbCko=
+k8s.io/api v0.18.6 h1:osqrAXbOQjkKIWDTjrqxWQ3w0GkKb1KA1XkUGHHYpeE=
+k8s.io/api v0.18.6/go.mod h1:eeyxr+cwCjMdLAmr2W3RyDI0VvTawSg/3RFFBEnmZGI=
 k8s.io/apimachinery v0.18.6 h1:RtFHnfGNfd1N0LeSrKCUznz5xtUP1elRGvHJbL3Ntag=
 k8s.io/apimachinery v0.18.6/go.mod h1:OaXp26zu/5J7p0f92ASynJa1pZo06YlV9fG7BoWbCko=
-k8s.io/client-go v0.18.5 h1:cLhGZdOmyPhwtt20Lrb7uAqxxB1uvY+NTmNJvno1oKA=
-k8s.io/client-go v0.18.5/go.mod h1:EsiD+7Fx+bRckKWZXnAXRKKetm1WuzPagH4iOSC8x58=
+k8s.io/client-go v0.18.6 h1:I+oWqJbibLSGsZj8Xs8F0aWVXJVIoUHWaaJV3kUN/Zw=
+k8s.io/client-go v0.18.6/go.mod h1:/fwtGLjYMS1MaM5oi+eXhKwG+1UHidUEXRh6cNsdO0Q=
 k8s.io/gengo v0.0.0-20190128074634-0689ccc1d7d6/go.mod h1:ezvh/TsK7cY6rbqRK0oQQ8IAqLxYwwyPxAX1Pzy0ii0=
 k8s.io/klog v0.0.0-20181102134211-b9b56d5dfc92/go.mod h1:Gq+BEi5rUBO/HRz0bTSXDUcqjScdoY3a9IHpCEIOOfk=
 k8s.io/klog v0.3.0/go.mod h1:Gq+BEi5rUBO/HRz0bTSXDUcqjScdoY3a9IHpCEIOOfk=