Update Maven POM for 1.0.23

This will update the Maven POM for XML Calabash 1.0.23.

XML Calabash successfully builds from this POM (except `MIMEReaderTest` and `XPointerTest`, which fail), and the result successfully runs some (rather complex, real-world) pipelines of mine.

I was unable to figure out which version of PlantUML `DiTAA.java` and `PlantUML.java` are written for, as these do not compile successfully against any of the versions I tried, so I've excluded them from being compiled in this POM.