new apt module format

tasks/main.yml

@@ -2,10 +2,9 @@
 
 - name: install packages
   apt:
-    pkg: "{{item}}"
-  with_items:
-    - ca-certificates
-    - apt-transport-https
+    pkg:
+      - ca-certificates
+      - apt-transport-https
 
 - name: atom apt repository key
   apt_key: