GUACAMOLE-1859: Update to latest compatible versions of JavaScript dependencies.

The Pickr library also has an update (v1.9.0), but that update does not
successfully build, possibly due to a different level of JavaScript
version compatibility.

doc/licenses/jquery-3.7.1/README

@@ -0,0 +1,8 @@
+jQuery (http://jquery.com/)
+---------------------------
+
+    Version: 3.7.1
+    From: 'OpenJS Foundation' (https://openjsf.org/)
+    License(s):
+        MIT (bundled/jquery-3.7.1/LICENSE.txt)
+