Rockfield: package.json version bump

rockfield/package.json

@@ -1,6 +1,6 @@
 {
   "name": "rockfield",
-  "version": "1.4.7",
+  "version": "1.4.8",
   "description": "Rockfield",
   "bugs": {
     "url": "https://github.com/Automattic/themes/issues"