Upgrade outdated dependencies: javaparser and codemodel

[VincentGuidon]

Hello,

While reviewing the dependency tree of jsonschema2pojo (version 1.3.3), I notice that two dependencies appear to be quite outdated and could benefit from modernization.

1. com.google.code.javaparser:javaparser:1.0.11

• This artifact is very old (~2013) and no longer maintained under this groupId.
• The project has since moved to com.github.javaparser
• The current versions (3.x) is actively maintained.

2. com.sun.codemodel:codemodel:2.6

• This version is also quite old (~2012)
• The project has moved to org.glassfish.jaxb
• The current versions (4.x) is actively maintained.

Thanks for your work on this project!