Pin dependencies

Author: gaearon

package.json

@@ -52,9 +52,9 @@
     "eslint-plugin-react": "5.2.2",
     "extract-text-webpack-plugin": "1.0.1",
     "file-loader": "0.9.0",
-    "filesize": "^3.3.0",
+    "filesize": "3.3.0",
     "fs-extra": "0.30.0",
-    "gzip-size": "^3.0.0",
+    "gzip-size": "3.0.0",
     "html-webpack-plugin": "2.22.0",
     "json-loader": "0.5.4",
     "opn": "4.0.2",