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>

vendor/github.com/spf13/cobra/.travis.yml

@@ -1,7 +1,6 @@
 language: go
 
 stages:
-  - diff
   - test
   - build
 
@@ -10,20 +9,20 @@ go:
   - 1.13.x
   - tip
 
+env: GO111MODULE=on
+
 before_install:
   - go get -u github.com/kyoh86/richgo
   - go get -u github.com/mitchellh/gox
+  - curl -sfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $(go env GOPATH)/bin latest
 
 matrix:
   allow_failures:
     - go: tip
   include:
-    - stage: diff
-      go: 1.13.x
-      script: make fmt
     - stage: build
       go: 1.13.x
       script: make cobra_generator
 
-script: 
+script:
  - make test