Bump k8s.io/client-go from 0.18.6 to 0.20.4

Bumps [k8s.io/client-go](https://github.com/kubernetes/client-go) from 0.18.6 to 0.20.4.
- [Release notes](https://github.com/kubernetes/client-go/releases)
- [Changelog](https://github.com/kubernetes/client-go/blob/master/CHANGELOG.md)
- [Commits](kubernetes/client-go@v0.18.6...v0.20.4)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Author: dependabot-preview[bot]

go.mod

@@ -3,17 +3,15 @@ module github.com/naveensrinivasan
 go 1.13
 
 require (
-	github.com/go-logr/logr v0.1.0
+	github.com/go-logr/logr v0.2.0
 	github.com/imdario/mergo v0.3.11 // indirect
 	github.com/matttproud/golang_protobuf_extensions v1.0.2-0.20181231171920-c182affec369 // indirect
 	github.com/onsi/ginkgo v1.14.2
 	github.com/onsi/gomega v1.10.3
 	github.com/pkg/errors v0.9.1 // indirect
 	github.com/prometheus/client_golang v1.7.1 // indirect
-	golang.org/x/time v0.0.0-20191024005414-555d28b269f0 // indirect
-	google.golang.org/protobuf v1.24.0 // indirect
-	k8s.io/api v0.18.6
-	k8s.io/apimachinery v0.18.6
-	k8s.io/client-go v0.18.6
+	k8s.io/api v0.20.4
+	k8s.io/apimachinery v0.20.4
+	k8s.io/client-go v0.20.4
 	sigs.k8s.io/controller-runtime v0.6.3
 )