This update for orthanc-ohif fixes the following issues:

Version 1.3:

  * Updated OHIF to 3.8.3
  * Enabled support for segmentation and microscopy modes
    Note that the microscopy mode is not stable yet in OHIF!
  * Fixed wrong MIME type for app-config.js that prevents the OHIF
    viewer from loading with Orthanc 1.12.2

Version 1.1:

  * Download moved to https://orthanc.uclouvain.be/downloads/sources/
  * Updated OHIF to 3.7.0
  * The default configuration has been adapted to avoid unneccesary
    transcoding on Orthanc side
  * make the build of static assets reproducible