restore socket.io-client line

config/webpack.dev.dll.js

@@ -27,6 +27,7 @@ module.exports = {
       'react', 'react-dom',
       'reactstrap', 'react-bootstrap-typeahead',
       'react-i18next', 'react-dropzone', 'react-hotkeys', 'react-copy-to-clipboard', 'react-waypoint',
+      'socket.io-client',
       'toastr',
       'unstated',
       'xss',