This update for libXISF fixes the following issues:

- Update to 0.2.12+git5.d00de20:
  * Add new XISFModify class to edit FITSKeywords
  * Make compression level 0-100
  * Fix calculation of compression level for ZSTD

- Update to 0.2.12:
  * Don't use replace to update attachement position
  * Add support for subblocks to handle +2GiB compressed images
  * Fix bug with writing ICCProfile
  * Add F32Matrix and F64Matrix into toString

- Update to 0.2.11:
  * Convert aperture and focal length from mm to meters.
  * Fix not loading String properties.

- Update to 0.2.10:
  * Fix incorrect header size.