Change extensions/v1beta to apps/v1 to be compliant with Kubernetes 1.16

Fixes #1237

docs/kubernetes/mailu/admin.yaml

@@ -1,4 +1,4 @@
-apiVersion: extensions/v1beta1
+apiVersion: apps/v1
 kind: Deployment
 metadata:
   name: mailu-admin
@@ -60,4 +60,4 @@ spec:
   ports:
   - name: http
     port: 80
-    protocol: TCP
+    protocol: TCP

docs/kubernetes/mailu/fetchmail.yaml

@@ -1,4 +1,4 @@
-apiVersion: extensions/v1beta1
+apiVersion: apps/v1
 kind: Deployment
 metadata:
   name: mailu-fetchmail
@@ -36,4 +36,4 @@ spec:
       volumes:
         - name: maildata
           persistentVolumeClaim:
-            claimName: mail-storage
+            claimName: mail-storage

docs/kubernetes/mailu/imap.yaml

@@ -1,4 +1,4 @@
-apiVersion: extensions/v1beta1
+apiVersion: apps/v1
 kind: Deployment
 metadata:
   name: mailu-imap

docs/kubernetes/mailu/ingress.yaml

@@ -1,4 +1,4 @@
-apiVersion: extensions/v1beta1
+apiVersion: apps/v1
 kind: Ingress
 metadata:
   name: mailu-ingress

docs/kubernetes/mailu/redis.yaml

@@ -1,4 +1,4 @@
-apiVersion: extensions/v1beta1
+apiVersion: apps/v1
 kind: Deployment
 metadata:
   name: mailu-redis
@@ -53,4 +53,4 @@ spec:
   ports:
   - name: redis
     port: 6379
-    protocol: TCP
+    protocol: TCP

docs/kubernetes/mailu/security.yaml

@@ -1,5 +1,4 @@
-
+apiVersion: apps/v1
-apiVersion: extensions/v1beta1
 kind: Deployment
 metadata:
   name: mailu-security
@@ -113,4 +112,4 @@ spec:
   ports:
   - name: antivirus
     port: 3310
-    protocol: TCP
+    protocol: TCP

docs/kubernetes/mailu/smtp.yaml

@@ -1,4 +1,4 @@
-apiVersion: extensions/v1beta1
+apiVersion: apps/v1
 kind: Deployment
 metadata:
   name: mailu-smtp

docs/kubernetes/mailu/webdav.yaml

@@ -1,4 +1,4 @@
-apiVersion: extensions/v1beta1
+apiVersion: apps/v1
 kind: Deployment
 metadata:
   name: mailu-webdav
@@ -60,4 +60,4 @@ spec:
     protocol: TCP
   - name: http-ui
     port: 5232
-    protocol: TCP
+    protocol: TCP

docs/kubernetes/mailu/webmail.yaml

@@ -1,5 +1,4 @@
-
+apiVersion: apps/v1
-apiVersion: extensions/v1beta1
 kind: Deployment
 metadata:
   name: mailu-roundcube

docs/kubernetes/nginx/default-http-backend.yaml

@@ -1,4 +1,4 @@
-apiVersion: extensions/v1beta1
+apiVersion: apps/v1
 kind: Deployment
 metadata:
   name: default-http-backend
@@ -52,4 +52,4 @@ spec:
   - port: 80
     targetPort: 8080
   selector:
-    app: default-http-backend
+    app: default-http-backend