Merge pull request #90 from dgrisonnet/bump-k8s-deps-1.21

go.mod: update golang and dependencies

go.mod

@@ -1,21 +1,21 @@
 module github.com/kubernetes-sigs/custom-metrics-apiserver
 
-go 1.15
+go 1.16
 
 require (
-	github.com/emicklei/go-restful v2.14.3+incompatible
+	github.com/emicklei/go-restful v2.15.0+incompatible
 	github.com/emicklei/go-restful-swagger12 v0.0.0-20201014110547-68ccff494617
-	github.com/go-openapi/spec v0.20.0
+	github.com/go-openapi/spec v0.20.3
 	github.com/googleapis/gnostic v0.4.1
 	github.com/spf13/pflag v1.0.5
-	github.com/stretchr/testify v1.6.1
-	k8s.io/api v0.20.0
-	k8s.io/apimachinery v0.20.0
-	k8s.io/apiserver v0.20.0
-	k8s.io/client-go v0.20.0
-	k8s.io/component-base v0.20.0
-	k8s.io/klog/v2 v2.4.0
-	k8s.io/kube-openapi v0.0.0-20201113171705-d219536bb9fd
-	k8s.io/metrics v0.20.0
-	k8s.io/utils v0.0.0-20201110183641-67b214c5f920
+	github.com/stretchr/testify v1.7.0
+	k8s.io/api v0.21.2
+	k8s.io/apimachinery v0.21.2
+	k8s.io/apiserver v0.21.2
+	k8s.io/client-go v0.21.2
+	k8s.io/component-base v0.21.2
+	k8s.io/klog/v2 v2.8.0
+	k8s.io/kube-openapi v0.0.0-20210305001622-591a79e4bda7
+	k8s.io/metrics v0.21.2
+	k8s.io/utils v0.0.0-20210707171843-4b05e18ac7d9
 )