Added missing files:test-utils.js entry to react-dom package.json

packages/react-dom/package.json

@@ -1,6 +1,6 @@
 {
   "name": "react-dom",
-  "version": "15.5.0-rc.1",
+  "version": "15.5.0-rc.2",
   "description": "React package for working with the DOM.",
   "main": "index.js",
   "repository": "facebook/react",
@@ -27,7 +27,8 @@
     "dist/",
     "lib/",
     "index.js",
-    "server.js"
+    "server.js",
+    "test-utils.js"
   ],
   "browserify": {
     "transform": [