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/logback-1.4.4/LICENSE.txt

@@ -0,0 +1,17 @@
+Logback LICENSE
+---------------
+
+Logback: the reliable, generic, fast and flexible logging framework.
+Copyright (C) 1999-2015, QOS.ch. All rights reserved.
+
+This program and the accompanying materials are dual-licensed under
+either the terms of the Eclipse Public License v1.0 as published by
+the Eclipse Foundation
+ 
+  or (per the licensee's choosing)
+ 
+under the terms of the GNU Lesser General Public License version 2.1
+as published by the Free Software Foundation.
+
+** ECLIPSE PUBLIC LICENSE v1.0 CHOSEN. **
+

doc/licenses/logback-1.4.4/README

@@ -0,0 +1,8 @@
+Logback (http://logback.qos.ch/)
+--------------------------------
+
+    Version: 1.4.4
+    From: 'QOS.ch Sàrl' (http://qos.ch/)
+    License(s):
+        EPL v1.0 (bundled/logback-1.4.4/LICENSE.txt)
+

doc/licenses/logback-1.4.4/dep-coordinates.txt

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+ch.qos.logback:logback-classic:jar:1.4.4
+ch.qos.logback:logback-core:jar:1.4.4