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/apache-mina-2.2.1/README

@@ -0,0 +1,8 @@
+Apache Mina (https://mina.apache.org/)
+--------------------------------------
+
+    Version: 2.2.1
+    From: 'Apache Software Foundation' (https://www.apache.org/)
+    License(s):
+        Apache v2.0
+