Features:
 - Much faster decoding of lossless WebP due to a variety of optimizations. Our benchmarks show 2x to 2.5x improvement.
 - Added support for orientation metadata, so that e.g. smartphone camera images could be displayed correctly:
   - Added `ImageDecoder::orientation()` and implemented orientation metadata extraction for JPEG, WebP and TIFF formats
   - Added `DynamicImage::apply_orientation()` to apply the orientation to an image
 - Added support for extracting Exif metadata from images via `ImageDecoder::exif_metadata()`, and implemented it for JPEG and WebP formats
 - Added `ImageEncoder::set_icc_profile()` and implemented it for WebP format. Pull requests with implementations for other formats are welcome.
 - Added `DynamicImage::fast_blur()` for a linear-time approximation of Gaussian blur, which is much faster at larger blur radii

Bug fixes:
 - Fixed some APNG images being decoded incorrectly
 - Fixed the iterator over animated WebP frames to return `None` instead of an error when the end of the animation is reached
 - Toggling the `rayon` feature now correctly toggles the use of `rayon` within `ravif` (AVIF encoder). Previously it would be either always on or always off, depending on the `ravif` version.