Merge pull request react-bootstrap#873 from AlexKVal/fsExtra

Update fs-extra. Dev dependency.

Author: mtscout6

package.json

@@ -60,7 +60,7 @@
     "express": "^4.12.3",
     "extract-text-webpack-plugin": "^0.8.0",
     "file-loader": "^0.8.1",
-    "fs-extra": "^0.19.0",
+    "fs-extra": "^0.20.0",
     "fs-promise": "^0.3.1",
     "glob": "^5.0.10",
     "http-proxy": "^1.11.1",