QuartzCore iOS 12.4 to 13.0 API Differences

CABase.h

Added #def CA_TEST

CALayer.h

Added CALayerCornerCurve

Added CALayer.cornerCurve

Added +[CALayer cornerCurveExpansionFactor:]

Added kCACornerCurveCircular

Added kCACornerCurveContinuous

CAMetalLayer.h

Added CAMetalLayer.preferredDevice

Added CAMetalLayer.colorspace