Support those values: - normal (same as 400) - bold (same as 700) - 100 (Thin) - 200 (Extra Light / Ultra Light) - 300 (Light) - 400 (Normal) - 500 (Medium) - 600 (Semi Bold / Demi Bold) - 700 (Bold) - 800 (Extra Bold / Ultra Bold) - 900 (Black / Heavy) [iOS Font Weights](https://developer.apple.com/library/ios/documentation/UIKit/Reference/UIFontDescriptor_Class/index.html#//apple_ref/doc/uid/TP40013284) [Android Font Weights](http://stackoverflow.com/questions/19691530/valid-values-for-androidfontfamily-and-what-they-map-to)
Support those values:
iOS Font Weights
Android Font Weights