fix(client): move SockJSClient definition

Author: knagaitsev

client-src/default/socket.js

@@ -5,17 +5,18 @@
   camelcase
 */
 
-// this SockJSClient is here as a default fallback, in case inline mode
-// is off or the client is not injected. This will be switched to
-// WebsocketClient when it becomes the default
-const SockJSClient = require('../clients/SockJSClient');
-
 let Client;
 try {
   // if __webpack_dev_server_client__ is undefined, we should fall back
   // to SockJSClient
   Client = __webpack_dev_server_client__;
 } catch (e) {
+  // this SockJSClient is here as a default fallback, in case inline mode
+  // is off or the client is not injected. This will be switched to
+  // WebsocketClient when it becomes the default
+
+  // eslint-disable-next-line global-require
+  const SockJSClient = require('../clients/SockJSClient');
   Client = SockJSClient;
 }