.fixtures.yml: Unpin puppet_agent module

Author: bastelfreak

.fixtures.yml

@@ -5,9 +5,7 @@ fixtures:
     facts: 'https://github.com/puppetlabs/puppetlabs-facts.git'
     portage: "https://github.com/gentoo/puppet-portage.git"
     provision: 'https://github.com/puppetlabs/provision.git'
-    puppet_agent:
-      repo: 'https://github.com/puppetlabs/puppetlabs-puppet_agent.git'
-      ref: v4.13.0
+    puppet_agent: 'https://github.com/puppetlabs/puppetlabs-puppet_agent.git'
     stdlib: "https://github.com/puppetlabs/puppetlabs-stdlib.git"
     yumrepo_core: 
       repo: "https://github.com/puppetlabs/puppetlabs-yumrepo_core.git"