Use new ingress apiVersion if available (#11)

Author: calvinbui

templates/ingress.yaml

@@ -2,7 +2,11 @@
 {{- if .Values.ingress.enabled }}
 {{- $fullName := include "swagger-ui.fullname" . -}}
 {{- $ingressPath := .Values.ingress.path -}}
+{{- if .Capabilities.APIVersions.Has "networking.k8s.io/v1beta1" }}
+apiVersion: networking.k8s.io/v1beta1
+{{ else }}
 apiVersion: extensions/v1beta1
+{{ end -}}
 kind: Ingress
 metadata:
   name: {{ template "swagger-ui.fullname" . }}