merge master, update minimal ansible version

Author: SrX

README.md

@@ -9,7 +9,7 @@ An Ansible role created by the folks behind PowerDNS to setup the [PowerDNS Auth
 
 ## Requirements
 
-An Ansible 2.12 or higher installation.
+An Ansible 2.15 or higher installation.
 
 ## Dependencies
 

meta/main.yml

@@ -7,7 +7,7 @@ galaxy_info:
   description: Install and configure the PowerDNS Authoritative DNS Server
   company: PowerDNS.COM BV
   license: MIT
-  min_ansible_version: "2.12"
+  min_ansible_version: "2.15"
   platforms:
     - name: EL
       versions: