Updated dependencies

* Removed 'react-router-dom' as no longer needed

Linked to:

* news-server v1.7.4
* auth-server v1.8.10
* chat-server v1.5.4

client/pages/administration/admin.jsx

@@ -1,5 +1,5 @@
 import React, { useContext } from 'react';
-import { Link, Navigate } from 'react-router-dom';
+import { Link, Navigate } from 'react-router';
 
 import ApplyToBody from '../utilities/apply-to-body';