Upgrade SDWebImage Image, use sd_ImageTransition with Placeholder

Describe the feature

From SDWebImage version 4.3.0 (latest ^5.10) it now supports fadeTransition animation when loading image. Allow Weex to pass values for this animation to the img directive to make image loading more elegant and less dependent on JS animation.

Additional context

https://github.com/SDWebImage/SDWebImage/wiki/Advanced-Usage#image-transition-430 from version 5+, we also get support for animated image formats such as GIF, WebP, APNG https://github.com/SDWebImage/SDWebImage/wiki/Advanced-Usage#animated-image-50