Merge pull request #3684 from reactjs/react-15.3

Run CI against new React release

Author: taion

package.json

@@ -78,10 +78,10 @@
     "mocha": "^2.5.3",
     "pretty-bytes": "^3.0.1",
     "qs": "^6.2.0",
-    "react": "^15.2.1",
-    "react-addons-css-transition-group": "^15.2.1",
-    "react-addons-test-utils": "^15.2.1",
-    "react-dom": "^15.2.1",
+    "react": "^15.3.0",
+    "react-addons-css-transition-group": "^15.3.0",
+    "react-addons-test-utils": "^15.3.0",
+    "react-dom": "^15.3.0",
     "rimraf": "^2.5.3",
     "style-loader": "^0.13.1",
     "webpack": "^1.13.1",