Jakarta compatibility

This release provides compatibility with the new Jakarta namespace for the JAXB-artifact. The JAXB stack is still based on the javax namespace in order to also be compatible with legacy Java EE, but care is taken to use on JAXB dependencies which may exist alongside any libraries from the newer Jakarta namespace. This is achieved using https://github.com/digipost/jaxb-resolver-com.sun.xml.bind

What's Changed

• Remove spring dependency by @simenstoa in #270
• Support marshalling to string and byte array by @runeflobakk in #274
• Use old JAXB artifacts by @runeflobakk in #281
• Finalize v3 by @runeflobakk in #288

Full Changelog: 2.8...3.0.0