Log Message:
kfilemetadata5: update to 5.108.0

5.100
  OdfExtractorTest: Add test cases for Flat XML documents
  OdfExtractor: Only go looking for textual content in office:body
  OdfExtractor: Support "Flat XML" variants
  PngExtractor: Only extract metadata when it was asked for
5.101
  FFmpegExtrator: Try stream metadata if no global metadata is available
  office2007extractor: Extract text document line count
  office2007extractor: Update docx to include more properties
  Add FictionBook2 extractor
5.102
  odfextractor: Add support for Open Document Graphics
5.103
  Also add external extractors to vector of all plugins
  Fix loading of external extractors and writers
5.104
  Mobi extractor: only extract what is asked
5.106
  Test HEIF in Exiv2Extractor
  Test JXL in Exiv2Extractor, extend JPEG coverage
  Remove usage of deprecated MP4::ItemListMap in taglib extractor
  Modernize and extend CMake check for Python3
  Make fb2 extractor compilation dependent on KF5Archive
5.107
  Cleanup property name/id mapping test
  Add method to export list of all Property names
  Reduce PropertyInfo construction overhead
  Add benchmark for PropertyInfo instantiation
5.108
  Reapply ReplayGain changes