Prepare release 3.9.2

metadata.json

 {
   "name": "jgazeley-freeradius",
-  "version": "3.9.1",
+  "version": "3.9.2",
   "author": "jgazeley",
   "summary": "Install and configure FreeRADIUS",
   "license": "Apache-2.0",
@@ -39,10 +39,9 @@
     {
       "operatingsystem": "Fedora",
       "operatingsystemrelease": [
-        "27",
-        "28",
         "29",
-        "30"
+        "30",
+	"31"
       ]
     },
     {
@@ -56,7 +55,6 @@
       "operatingsystem": "Ubuntu",
       "operatingsystemrelease": [
         "18.04",
-        "18.10",
         "19.04",
         "19.10"
       ]