update tasks to use the new preferred looping syntax (#10)

tasks/main.yml

@@ -6,9 +6,10 @@
 
 - name: Install WireGuard
   package:
-    name: "{{ item }}"
+    name: "{{ packages }}"
     state: present
-  with_items:
+  vars:
+    packages:
     - wireguard-dkms
     - wireguard-tools
   tags:

tasks/setup-archlinux.yml

@@ -1,10 +1,11 @@
 ---
 - name: Install required packages
   pacman:
-    name: "{{ item }}"
+    name: "{{ packages }}"
     state: present
   become: yes
-  with_items:
+  vars:
+    packages:
       - linux-headers
   tags:
     - wg-install

tasks/setup-ubuntu.yml

@@ -8,9 +8,10 @@
 
 - name: Install required packages
   package:
-    name: "{{ item }}"
+    name: "{{ packages }}"
     state: present
-  with_items:
+  vars:
+    packages:
     - software-properties-common
     - linux-headers-{{ ansible_kernel }}
   tags: