v0.10.3

Changed

• Minor dependency updates
• Minor test coverage updates
• Improved error message on Bluesky errors
• Early return when trying to compress an image that's already within the maximum size allowed by Bluesky, to avoid unnecessary processing.

Fixed

• Handle invalid MIME types when posting images to Bluesky
• Bluesky connection: handle Bluesky internal server errors gracefully when attempting to upload an embed image for a post.