Fix flow errors

package.json

@@ -95,6 +95,7 @@
     "extract-text-webpack-plugin": "1.0.1",
     "file-loader": "0.9.0",
     "flow": "^0.2.3",
+    "flow-typed": "^2.1.2",
     "highlight.js": "9.4.0",
     "history": "3.0.0",
     "html-webpack-plugin": "2.17.0",
@@ -173,8 +174,8 @@
     "lint-staged": "^3.4.0",
     "node-dev": "3.1.0",
     "nodemon": "1.11.0",
-    "prettier": "^1.2.2",
+    "prettier": "1.3.1",
     "react-addons-test-utils": "^15.3.1",
     "react-test-renderer": "^15.3.1"
   }
-}
+}