Bump k8s.io/apimachinery from 0.18.8 to 0.19.0

Bumps [k8s.io/apimachinery](https://github.com/kubernetes/apimachinery) from 0.18.8 to 0.19.0.
- [Release notes](https://github.com/kubernetes/apimachinery/releases)
- [Commits](https://github.com/kubernetes/apimachinery/compare/v0.18.8...v0.19.0

)
Signed-off-by: dependabot[bot] <support@github.com>

go.mod

@@ -3,13 +3,12 @@ module github.com/weaveworks/kured
 go 1.13
 
 require (
-	github.com/googleapis/gnostic v0.2.0 // indirect
 	github.com/inconshreveable/mousetrap v1.0.0 // indirect
 	github.com/prometheus/client_golang v0.0.0-20181230203121-fb3d5cb2ad57
 	github.com/prometheus/common v0.0.0-20181218105931-67670fe90761
 	github.com/prometheus/procfs v0.0.0-20190102135031-14fa7590c24d // indirect
 	github.com/sirupsen/logrus v1.2.0
 	github.com/spf13/cobra v0.0.0-20181127133106-d2d81d9a96e2
-	k8s.io/apimachinery v0.18.8
+	k8s.io/apimachinery v0.19.0
 	k8s.io/client-go v0.18.8
 )