GUACAMOLE-1594: Update all Java and JavaScript dependencies to latest compatible.

NOTE: Several WebPack plugins could not be updated as all plugins within
WebPack's "webpack-contrib" have dropped support for WebPack v4
entirely, but Closure Compiler only supports WebPack v4.

doc/licenses/directory-api-2.1.2/NOTICE

@@ -0,0 +1,5 @@
+Apache Directory LDAP API
+Copyright 2003-2021 The Apache Software Foundation
+
+This product includes software developed at
+The Apache Software Foundation (http://www.apache.org/).

doc/licenses/directory-api-2.1.2/README

@@ -0,0 +1,8 @@
+Apache Directory LDAP API (http://directory.apache.org)
+-------------------------------------------------------
+
+    Version: 2.1.2
+    From: 'Apache Software Foundation' (https://www.apache.org/)
+    License(s):
+        Apache v2.0
+

doc/licenses/directory-api-2.1.2/dep-coordinates.txt

@@ -0,0 +1 @@
+org.apache.directory.api:api-all:jar:2.1.2