Update module metadata to support more OSes

metadata.json

@@ -6,19 +6,20 @@
   "license": "Apache-2.0",
   "source": "",
   "dependencies": [
-
   ],
   "operatingsystem_support": [
     {
       "operatingsystem": "Debian",
       "operatingsystemrelease": [
-        "8"
+        "8",
+        "9"
       ]
     },
     {
       "operatingsystem": "Ubuntu",
       "operatingsystemrelease": [
-        "16.04"
+        "16.04",
+        "18.04"
       ]
     }
   ],
@@ -31,4 +32,4 @@
   "pdk-version": "1.9.0",
   "template-url": "file://C:/Program Files/Puppet Labs/DevelopmentKit/share/cache/pdk-templates.git",
   "template-ref": "1.9.0-0-g7281db5"
-}
+}