Upgrade Apache Commons Digester 2.1 to 3.2

[sandeepk-veritas]

Current version used for Apache Commons Digester is 2.1 and is quite old. This is getting detected as EOL by source code scanners.

Project has moved to commons-digester3 and it could be used instead, but its supposed to be incompatible with 2.x version. In fact, 3.2 version is also almost 12 yrs old now. So it can be also considered EOL.

https://commons.apache.org/proper/commons-digester/ and https://github.com/apache/commons-digester

<dependency>
  <groupId>org.apache.commons</groupId>
  <artifactId>commons-digester3</artifactId>
  <version>3.2</version>
  <classifier>with-deps</classifier>
</dependency>

Is there any chance there are alternatives to Apache Commons Digester that can be in its place?

Note: Related to #260. If alternative to Apache Commons Digester is possible, it will be taken care as well.

[teodord]

As mentioned on the other tracker, Digester is EOL, because it is feature complete. it does what it does and we have not urgent need to replace it.
If one day we'll need to do something about it, the easiest would be to fork it and maintain it ourselves. Much easier than replacing with something else.