Update PE compatibility info in metadata

Now compatible with PE 3.4.

Author: Colleen Murphy

metadata.json

@@ -59,7 +59,7 @@
   "requirements": [
     {
       "name": "pe",
-      "version_requirement": ">= 3.2.0 < 3.4.0"
+      "version_requirement": "3.x"
     },
     {
       "name": "puppet",