[1.0.0] - 2023-11-28

Added

• Added ImageMetadata structure.
• Added ImageHandle methods:
  • metadata_item_uri_type
  • all_metadata
  • preferred_decoding_colorspace

Changes

• libheif-sys updated to version 2.1.
• vcpkg updated to version 2023.11.20.

Fixed

• Fix null error message from libheif v1.17: heif_writer should
  return heif_error with non-null pointer to message (#18).