Bump github.com/zalando/skipper from 0.17.32 to 0.18.15

Bumps [github.com/zalando/skipper](https://github.com/zalando/skipper) from 0.17.32 to 0.18.15.
- [Release notes](https://github.com/zalando/skipper/releases)
- [Commits](zalando/skipper@v0.17.32...v0.18.15)

---
updated-dependencies:
- dependency-name: github.com/zalando/skipper
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

go.mod

@@ -12,16 +12,14 @@ require (
 	github.com/prometheus/client_golang v1.17.0
 	github.com/sirupsen/logrus v1.9.3
 	github.com/stretchr/testify v1.8.4
-	github.com/zalando/skipper v0.17.32
+	github.com/zalando/skipper v0.18.15
 	gopkg.in/alecthomas/kingpin.v2 v2.2.6
-	k8s.io/api v0.24.17
-	k8s.io/apimachinery v0.24.17
-	k8s.io/client-go v0.24.17
+	k8s.io/api v0.26.2
+	k8s.io/apimachinery v0.26.2
+	k8s.io/client-go v0.26.2
 )
 
 require (
-	github.com/PuerkitoBio/purell v1.1.1 // indirect
-	github.com/PuerkitoBio/urlesc v0.0.0-20170810143723-de5bf2ad4578 // indirect
 	github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751 // indirect
 	github.com/alecthomas/units v0.0.0-20211218093645-b94a6e3cc137 // indirect
 	github.com/beorn7/perks v1.0.1 // indirect
@@ -33,11 +31,11 @@ require (
 	github.com/dgryski/go-mpchash v0.0.0-20200819201138-7382f34c4cd1 // indirect
 	github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f // indirect
 	github.com/dimfeld/httppath v0.0.0-20170720192232-ee938bf73598 // indirect
-	github.com/emicklei/go-restful v2.16.0+incompatible // indirect
+	github.com/emicklei/go-restful/v3 v3.10.1 // indirect
 	github.com/evanphx/json-patch v4.12.0+incompatible // indirect
 	github.com/go-logr/logr v1.2.4 // indirect
 	github.com/go-openapi/jsonpointer v0.19.5 // indirect
-	github.com/go-openapi/jsonreference v0.19.5 // indirect
+	github.com/go-openapi/jsonreference v0.20.0 // indirect
 	github.com/go-openapi/swag v0.19.14 // indirect
 	github.com/go-playground/locales v0.14.1 // indirect
 	github.com/go-playground/universal-translator v0.18.1 // indirect
@@ -54,9 +52,7 @@ require (
 	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
 	github.com/modern-go/reflect2 v1.0.2 // indirect
 	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
-	github.com/nxadm/tail v1.4.8 // indirect
 	github.com/oklog/ulid v1.3.1 // indirect
-	github.com/onsi/gomega v1.20.0 // indirect
 	github.com/opentracing/opentracing-go v1.2.0 // indirect
 	github.com/pkg/errors v0.9.1 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
@@ -65,16 +61,16 @@ require (
 	github.com/prometheus/common v0.44.0 // indirect
 	github.com/prometheus/procfs v0.11.1 // indirect
 	github.com/rcrowley/go-metrics v0.0.0-20201227073835-cf1acfcdf475 // indirect
-	github.com/redis/go-redis/v9 v9.1.0 // indirect
+	github.com/redis/go-redis/v9 v9.2.0 // indirect
 	github.com/tidwall/pretty v1.2.1 // indirect
 	go.uber.org/atomic v1.10.0 // indirect
 	go4.org/netipx v0.0.0-20230125063823-8449b0a6169f // indirect
-	golang.org/x/crypto v0.12.0 // indirect
-	golang.org/x/net v0.14.0 // indirect
-	golang.org/x/oauth2 v0.11.0 // indirect
-	golang.org/x/sys v0.11.0 // indirect
-	golang.org/x/term v0.11.0 // indirect
-	golang.org/x/text v0.12.0 // indirect
+	golang.org/x/crypto v0.13.0 // indirect
+	golang.org/x/net v0.15.0 // indirect
+	golang.org/x/oauth2 v0.12.0 // indirect
+	golang.org/x/sys v0.12.0 // indirect
+	golang.org/x/term v0.12.0 // indirect
+	golang.org/x/text v0.13.0 // indirect
 	golang.org/x/time v0.3.0 // indirect
 	google.golang.org/appengine v1.6.7 // indirect
 	google.golang.org/protobuf v1.31.0 // indirect
@@ -83,12 +79,12 @@ require (
 	gopkg.in/inf.v0 v0.9.1 // indirect
 	gopkg.in/yaml.v2 v2.4.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
-	k8s.io/klog/v2 v2.60.1 // indirect
-	k8s.io/kube-openapi v0.0.0-20220328201542-3ee0da9b0b42 // indirect
-	k8s.io/utils v0.0.0-20220210201930-3a6ce19ff2f9 // indirect
-	sigs.k8s.io/json v0.0.0-20211208200746-9f7c6b3444d2 // indirect
+	k8s.io/klog/v2 v2.90.1 // indirect
+	k8s.io/kube-openapi v0.0.0-20221012153701-172d655c2280 // indirect
+	k8s.io/utils v0.0.0-20230220204549-a5ecb0141aa5 // indirect
+	sigs.k8s.io/json v0.0.0-20220713155537-f223a00ba0e2 // indirect
 	sigs.k8s.io/structured-merge-diff/v4 v4.2.3 // indirect
-	sigs.k8s.io/yaml v1.2.0 // indirect
+	sigs.k8s.io/yaml v1.3.0 // indirect
 )
 
 replace github.com/go-redis/redis/v9 => github.com/szuecs/redis/v9 v9.0.0-beta.1.0.20220801200609-6f7f800107ba