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/jose4j-0.9.1/README

@@ -0,0 +1,8 @@
+jose.4.j (https://bitbucket.org/b_c/jose4j/)
+--------------------------------------------
+
+    Version: 0.9.1
+    From: 'Brian Campbell' (https://bitbucket.org/b_c/)
+    License(s):
+        Apache v2.0
+