Switching to proper boolean

roles/base/tasks/core_cert.yml

@@ -15,14 +15,14 @@
     state: latest
     extra_args: --upgrade
   when: ansible_python_version is version('3', '>=')
-  become: yes
+  become: true
 
 - name: Install latest python2-cryptography
   package:
     name: python2-cryptography
     state: latest
   when: ((ansible_python_version is version('2', '>=')) and (ansible_python_version is version('3', '<')) )
-  become: no
+  become: false
 
 - name: Install latest cryptography
   pip:
@@ -30,7 +30,7 @@
     executable: pip3
     state: latest
   when: ansible_python_version is version('3', '>=')
-  become: yes
+  become: true
 
 - name: Ensure directory exists for local self-signed TLS certs
   file: