Revert "Update dependency puppetlabs-puppet_conf to v2.1.0 (#100)"

This reverts commit a91fa55.

Author: bastelfreak

Puppetfile

@@ -27,7 +27,7 @@ mod 'puppetlabs-zone_core', '1.2.0'
 
 # Useful additional modules
 mod 'puppetlabs-package', '3.1.0'
-mod 'puppetlabs-puppet_conf', '2.1.0'
+mod 'puppetlabs-puppet_conf', '2.0.0'
 mod 'puppetlabs-reboot', '5.0.0'
 mod 'puppetlabs-stdlib', '9.6.0'