Log Message:
py-pillow_heif: updated to 0.16.0

0.16.0

This release contains breaking change for monochrome images.

Added

- Monochrome images **without alpha** channel, will be opened in `L` or `I;16` \ 
mode instead of `RGB`.

Changed

- `convert_hdr_to_8bit` value now ignores `monochrome` images.
- `subsampling` parameter for encoding has higher priority than `chroma`.
- Minimum required `libehif` version is `1.17.0`.
- Minimum supported Pillow version raised to `9.5.0`.