Update blurhash implementation from Nheko
From https://github.com/Nheko-Reborn/blurhash. Also docks the default blurhash resolution to 64x64 instead of giant 256x256 images.
From https://github.com/Nheko-Reborn/blurhash. Also docks the default blurhash resolution to 64x64 instead of giant 256x256 images.