Export FontExtension (#2761)

Author: M-i-k-e-l

lib/components/index.ts

@@ -1,11 +1,12 @@
-import DynamicFonts from './DynamicFonts';
+import DynamicFonts, {FontExtension} from './DynamicFonts';
 import HighlighterOverlayView from './HighlighterOverlayView';
 import SafeAreaSpacerView from './SafeArea/SafeAreaSpacerView';
 import SafeAreaInsetsManager from './SafeArea/SafeAreaInsetsManager';
 import Keyboard, {KeyboardTrackingViewProps, KeyboardAccessoryViewProps} from './Keyboard';
 
 export {
   DynamicFonts,
+  FontExtension,
   HighlighterOverlayView,
   SafeAreaSpacerView,
   SafeAreaInsetsManager,