Fix UIColor extension returning Int for alpha when it should be CGFloat
Fix UIColor extension returning Int for alpha when it should be CGFloat

goktugyil/EZSwiftExtensions,goktugyil/EZSwiftExtensions,kirakik/EZSwiftExtensions,piv199/EZSwiftExtensions,kirakik/EZSwiftExtensions,piv199/EZSwiftExtensions,astrokin/EZSwiftExtensions,astrokin/EZSwiftExtensions