update dependencies that show vulnerabilites

Signed-off-by: Sandor Szücs <sandor.szuecs@zalando.de>

go.mod

@@ -17,6 +17,7 @@ require (
 	github.com/linki/instrumented_http v0.3.0
 	github.com/lufia/plan9stats v0.0.0-20220326011226-f1430873d8db // indirect
 	github.com/mweagle/go-cloudformation v0.0.0-20210117063902-00aa242fdc67
+	github.com/opencontainers/runc v1.1.3 // indirect
 	github.com/power-devops/perfstat v0.0.0-20220216144756-c35f1ee13d7c // indirect
 	github.com/pquerna/cachecontrol v0.1.0 // indirect
 	github.com/prometheus/client_golang v1.12.1
@@ -26,18 +27,16 @@ require (
 	github.com/sirupsen/logrus v1.8.1
 	github.com/stretchr/testify v1.7.1
 	github.com/tidwall/gjson v1.14.0 // indirect
-	github.com/zalando/skipper v0.13.204
+	github.com/zalando/skipper v0.13.231
 	golang.org/x/crypto v0.0.0-20220331220935-ae2d96664a29 // indirect
 	golang.org/x/net v0.0.0-20220403103023-749bd193bc2b // indirect
 	golang.org/x/oauth2 v0.0.0-20220309155454-6242fa91716a // indirect
-	golang.org/x/sys v0.0.0-20220405052023-b1e9470b6e64 // indirect
 	golang.org/x/tools v0.1.10 // indirect
-	google.golang.org/appengine v1.6.7 // indirect
 	google.golang.org/genproto v0.0.0-20220401170504-314d38edb7de // indirect
 	gopkg.in/alecthomas/kingpin.v2 v2.2.6
 	gopkg.in/go-playground/assert.v1 v1.2.1 // indirect
 	gopkg.in/go-playground/validator.v9 v9.31.0 // indirect
-	k8s.io/api v0.22.0
-	k8s.io/apimachinery v0.22.0
-	k8s.io/client-go v0.22.0
+	k8s.io/api v0.22.5
+	k8s.io/apimachinery v0.22.5
+	k8s.io/client-go v0.22.5
 )