SkyEpub 8.3.1 for iOS Released

Resolved the issues below
1. App crashes when Fixed Layout book opens in Landscape mode in iOS 14.0 or above. (Curling Effect)
2. App crashes when Fixed Layout book rotates in iOS 14.0 or above. (Curling Effect)
3. Zoom scale does not match to iPad Portrait mode.

New API in Fixed Layout
/** returns the current zoom scale of fixed layout */
-(double)zoomScale;