kcodecs: update to 5.108.0

5.100
  Prepare for 5.15.7: adapt test
5.101
  Fix KCharset::codecForName deprecation version
  Deprecate QTextCodec public api
5.103
  Remove winsami2 from codecs list
  Replace jis7 with ISO-2022-JP in offered codecs
  Fix name for CP 949 in KCharsets::encodingsByScript

(markd)