Many, many changes since 1.20.0:

• Addition of upscaling pipeline
• Memory efficient transformers with --xformers-memory-efficient-attention
• Halve image size using python:slim
• Use any scheduler, including the newly added ones with --scheduler
• Loading pipelines with safetensors to increase loading speed
• Publish new releases automatically to ghcr
• Depth-guided stable diffusion
• Rename old img2img options
• Support all the most popular models, including community-made ones
• Documentation improvements
• and more!