Bump React dev dep (#3261)

Author: taion

package.json

@@ -65,10 +65,10 @@
     "mocha": "^2.4.5",
     "pretty-bytes": "^3.0.1",
     "qs": "^6.1.0",
-    "react": "^0.14.8",
-    "react-addons-css-transition-group": "^0.14.8",
-    "react-addons-test-utils": "^0.14.8",
-    "react-dom": "^0.14.8",
+    "react": "^15.0.0",
+    "react-addons-css-transition-group": "^15.0.0",
+    "react-addons-test-utils": "^15.0.0",
+    "react-dom": "^15.0.0",
     "rimraf": "^2.5.2",
     "style-loader": "^0.13.1",
     "webpack": "^1.12.14",