BibleGet I/O

This release updates the extension to be compatible with LibreOffice 6. It also fixes the recent break which came about with an update to the BibleGet Project server which started setting HSTS security headers, enforcing the usage of the https protocol throughout the domain. This effectively broke plugins that used the http protocol to reach the query.bibleget.io service endpoint, so this update to the plugin makes use of the https protocol when querying the endpoint.