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/guava-31.1-jre/README

@@ -0,0 +1,8 @@
+Guava: Google Core Libraries for Java (https://github.com/google/guava)
+-----------------------------------------------------------------------
+
+    Version: 31.1-jre
+    From: 'Google Inc.' (http://www.google.com/)
+    License(s):
+        Apache v2.0
+

doc/licenses/guava-31.1-jre/dep-coordinates.txt

@@ -0,0 +1,3 @@
+com.google.guava:failureaccess:jar:1.0.1
+com.google.guava:guava:jar:31.1-jre
+com.google.guava:listenablefuture:jar:9999.0-empty-to-avoid-conflict-with-guava