D11193: Sonnet : use current hunspell API

[René J . V . Bertin]

rjvbb added reviewers: dfaure, mlaurent, vkrause.

REPOSITORY
  R246 Sonnet

REVISION DETAIL
  https://phabricator.kde.org/D11193

To: rjvbb, #frameworks, dfaure, mlaurent, vkrause
Cc: kde-frameworks-devel, michaelh, ngraham