Complete history of changes available here: v2.2.5...v2.2.6

New features

SVG support using SkiaSharp library. It's super fast as it uses all FFImageLoading caching capabilities. More here: Wiki.
Windows BIG performance improvement - implemented LRU memory cache. Default cache size is 32MB for phones / 128MB for desktops (configurable)
WorkScheduler - always run image loading on thread pool
Added DownloadProgress and FileWriteFinished events / commands
Bump up the priority on pending tasks if similar tasks have a higher priority
Windows projects reconfigured, added UWP Forms sample

Fixes

Do not break image loading when placeholder failed
Fixed image loading delayed twice when using delay option
Fixed CacheType.Disk not working correctly
FadeAnimationEnabledForCached is now independent of FadeAnimationEnabled
[Xamarin.Forms] Fixed #396 DiskCacheDuration is always Zero
[Xamarin.Forms iOS] Fixed file image source not loading in some cases
[Android] MemoryCache fixes, replaced LRU cache implementation
[Android] Fixed #416 NetworkOnMainThreadException
[Android] Fixed #408 ConcurrentModificationException during InvalidateCacheAsync
[Android] Android/Compatibility: ImageViewAsync - Disabled custom fit logic when AlignMode/ScaleToFit properties not used
[Android] CanUseForInBitmap - Round up to power of 2 (added back)
[iOS] Fixed Scale helper deadlock
[iOS] Fixed bug when omitting file extensions for bundled resources
[iOS] Fixed #415 iOS Configuration.MaxMemoryCacheSize not working correctly
some others fixes