MetalPerformanceShaders iOS 13.2 to 13.4 API Differences

../Frameworks/MPSImage.framework/Headers/MPSImageGuidedFilter.h

Added -[MPSImageGuidedFilter encodeRegressionToCommandBuffer:sourceTexture:guidanceTexture:weightsTexture:destinationCoefficientsTextureA:destinationCoefficientsTextureB:]

Added -[MPSImageGuidedFilter encodeReconstructionToCommandBuffer:guidanceTexture:coefficientsTextureA:coefficientsTextureB:destinationTexture:]

../Frameworks/MPSRayIntersector.framework/Headers/MPSRayIntersector.h

Added MPSRayMaskOperatorEqual

Added MPSRayMaskOperatorNotEqual