Closes #3568: Update jQuery library to v3.4.1

netbox/templates/_base.html

@@ -65,7 +65,7 @@
             </div>
         </div>
     </footer>
-<script src="{% static 'js/jquery-3.3.1.min.js' %}"></script>
+<script src="{% static 'js/jquery-3.4.1.min.js' %}"></script>
 <script src="{% static 'jquery-ui-1.12.1/jquery-ui.min.js' %}"></script>
 <script src="{% static 'bootstrap-3.4.1-dist/js/bootstrap.min.js' %}"></script>
 <script src="{% static 'select2-4.0.5/js/select2.min.js' %}"></script>