Fix some ansible-lint complaints.

roles/up2date-debian/tasks/main.yml

@@ -2,36 +2,36 @@
 
 - name: update apt package lists
   apt:
-    update_cache: yes
+    update_cache: true
     cache_valid_time: 86400
 
 - name: upgrade packages
   apt:
     upgrade: dist
-    autoremove: yes
-    autoclean: yes
+    autoremove: true
+    autoclean: true
 
 - name: install etckeeper
   apt:
     name: etckeeper
-    state: latest
+    state: latest # noqa package-latest
 
 - name: install extra packages from stable
   apt:
     name: "{{ extra_pkgs }}"
-    state: latest
+    state: latest # noqa package-latest
   when: extra_pkgs|length
 
 - name: add {{ ansible_distribution_release }}-backports
   apt_repository:
     repo: deb http://deb.debian.org/debian/ {{ ansible_distribution_release }}-backports main
     state: present
-    update_cache: yes
+    update_cache: true
   when: extra_pkgs_bpo|length
 
 - name: install extra packages from backports
   apt:
     name: "{{ extra_pkgs_bpo }}"
-    state: latest
+    state: latest # noqa package-latest
     default_release: "{{ ansible_distribution_release }}-backports"
   when: extra_pkgs_bpo|length