Merge pull request #538 from alexjfisher/update_stdlib_dependency

Allow `puppetlabs/stdlib` 6.x

Author: bastelfreak

metadata.json

@@ -47,7 +47,7 @@
     },
     {
       "name": "puppetlabs/stdlib",
-      "version_requirement": ">= 4.25.0 < 6.0.0"
+      "version_requirement": ">= 4.25.0 < 7.0.0"
     }
   ]
 }