Log Message:
kpackage: update to 5.108.0

5.99
  Build test KPackage structure as static plugin
  Fix duplicate symbol in static builds
  Ignore sddmtheme dependencies if we do not have the knsrc file installed
  Remove unneeded known categories
5.103
  Update README with new json metadata
  Show deprecation message about the desktop to json conversion being removed
5.104
  Check pluginId contains '/' before using it as package type
5.106
  Deprecate KPackage::Package::name, add default for parameters
5.108
  Define json-validate-ignore property in .kde-ci.yml