deps: update to k8s API v0.19.1 (#28)

go.mod

@@ -4,18 +4,12 @@ go 1.12
 
 require (
 	github.com/go-kit/kit v0.10.0
-	github.com/go-logr/logr v0.2.1 // indirect
+	github.com/google/go-cmp v0.5.5 // indirect
 	github.com/google/gofuzz v1.2.0 // indirect
 	github.com/gorilla/mux v1.8.0
-	github.com/jessevdk/go-flags v1.4.0 // indirect
-	github.com/json-iterator/go v1.1.10 // indirect
-	golang.org/x/net v0.0.0-20200904194848-62affa334b73 // indirect
-	golang.org/x/text v0.3.3 // indirect
+	golang.org/x/net v0.0.0-20210410081132-afb366fc7cd1 // indirect
 	golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1
-	gopkg.in/yaml.v2 v2.3.0 // indirect
-	k8s.io/api v0.19.1
-	k8s.io/apimachinery v0.19.1
-	k8s.io/klog v1.0.0 // indirect
-	k8s.io/klog/v2 v2.3.0 // indirect
-	sigs.k8s.io/structured-merge-diff/v3 v3.0.0 // indirect
+	k8s.io/api v0.21.0
+	k8s.io/apimachinery v0.21.0
+	sigs.k8s.io/structured-merge-diff/v4 v4.1.1 // indirect
 )