bump controller-runtime to v0.8.3

bump kubernetes dependency to v1.20.6

Signed-off-by: RainbowMango <renhongcai@huawei.com>

go.mod

@@ -4,21 +4,24 @@ go 1.14
 
 require (
 	github.com/evanphx/json-patch/v5 v5.1.0
-	github.com/go-logr/logr v0.3.0 // indirect
-	github.com/google/uuid v1.1.1
-	github.com/onsi/ginkgo v1.12.1
-	github.com/onsi/gomega v1.10.1
+	github.com/google/uuid v1.1.2
+	github.com/onsi/ginkgo v1.14.1
+	github.com/onsi/gomega v1.10.2
 	github.com/spf13/cobra v1.1.1
 	github.com/spf13/pflag v1.0.5
-	k8s.io/api v0.19.3
-	k8s.io/apiextensions-apiserver v0.19.3
-	k8s.io/apimachinery v0.19.3
-	k8s.io/apiserver v0.19.3
-	k8s.io/client-go v0.19.3
-	k8s.io/code-generator v0.19.3
-	k8s.io/component-base v0.19.3
-	k8s.io/klog/v2 v2.2.0
-	k8s.io/utils v0.0.0-20200729134348-d5654de09c73
-	sigs.k8s.io/controller-runtime v0.6.4
+	k8s.io/api v0.20.6
+	k8s.io/apiextensions-apiserver v0.20.6
+	k8s.io/apimachinery v0.20.6
+	k8s.io/apiserver v0.20.6
+	k8s.io/client-go v0.20.6
+	k8s.io/code-generator v0.20.6
+	k8s.io/component-base v0.20.6
+	k8s.io/klog/v2 v2.4.0
+	k8s.io/utils v0.0.0-20210111153108-fddb29f9d009
+	sigs.k8s.io/controller-runtime v0.8.3
 	sigs.k8s.io/kind v0.10.0
 )
+
+// controller-runtime@v0.8.3 uses gnostic@v0.5.1 which not compatible with kubernetes@v1.20.2.
+// kubernetes@v1.20.2 using gnostic@v0.4.1.
+replace github.com/googleapis/gnostic => github.com/googleapis/gnostic v0.4.1