Use apiextension v1

- upgrade from apiextension v1beta1 to v1
 - generate yaml manifest for crd intead of applying it at runtime
  - users will have to apply the manifest with kubectl
 - kg and kgctl log an error if the crd is not present
 - now validation should actually work

Signed-off-by: leonnicolas <leonloechner@gmx.de>

go.mod

@@ -3,29 +3,26 @@ module github.com/squat/kilo
 go 1.15
 
 require (
-	github.com/ant31/crd-validation v0.0.0-20180801212718-38f6a293f140
 	github.com/awalterschulze/gographviz v0.0.0-20181013152038-b2885df04310
 	github.com/campoy/embedmd v1.0.0
 	github.com/containernetworking/cni v0.6.0
 	github.com/containernetworking/plugins v0.6.0
 	github.com/coreos/go-iptables v0.4.0
-	github.com/fsnotify/fsnotify v1.4.9 // indirect
 	github.com/go-kit/kit v0.9.0
-	github.com/go-openapi/spec v0.19.5
 	github.com/imdario/mergo v0.3.6 // indirect
 	github.com/kylelemons/godebug v0.0.0-20170820004349-d65d576e9348
 	github.com/oklog/run v1.0.0
 	github.com/prometheus/client_golang v1.7.1
-	github.com/spf13/cobra v1.1.1
+	github.com/spf13/cobra v1.1.3
 	github.com/spf13/pflag v1.0.5
 	github.com/vishvananda/netlink v1.0.0
 	github.com/vishvananda/netns v0.0.0-20180720170159-13995c7128cc // indirect
 	golang.org/x/lint v0.0.0-20200302205851-738671d3881b
-	golang.org/x/sys v0.0.0-20210225134936-a50acf3fe073
-	k8s.io/api v0.21.0
-	k8s.io/apiextensions-apiserver v0.21.0
-	k8s.io/apimachinery v0.21.0
-	k8s.io/client-go v0.21.0
-	k8s.io/code-generator v0.21.0
-	k8s.io/kube-openapi v0.0.0-20210305001622-591a79e4bda7
+	golang.org/x/sys v0.0.0-20210510120138-977fb7262007
+	k8s.io/api v0.21.1
+	k8s.io/apiextensions-apiserver v0.21.1
+	k8s.io/apimachinery v0.21.1
+	k8s.io/client-go v0.21.1
+	k8s.io/code-generator v0.21.1
+	sigs.k8s.io/controller-tools v0.6.0
 )