Update controller and k8s client versions (#42)

Author: astaticvoid

go.mod

@@ -10,9 +10,12 @@ require (
 	github.com/golang/mock v1.6.0
 	github.com/onsi/ginkgo v1.14.1
 	github.com/onsi/gomega v1.10.2
+	github.com/stretchr/testify v1.6.1
 	gotest.tools v2.2.0+incompatible
-	k8s.io/api v0.19.2
-	k8s.io/apimachinery v0.19.2
-	k8s.io/client-go v0.19.2
-	sigs.k8s.io/controller-runtime v0.7.2
+	k8s.io/api v0.20.2
+	k8s.io/apimachinery v0.20.2
+	k8s.io/client-go v0.20.2
+	sigs.k8s.io/controller-runtime v0.8.3
 )
+
+replace github.com/spf13/viper v1.4.0 => github.com/spf13/viper v1.8.0