fix: allow callback to be async (#183)

Co-authored-by: Vincent Pizzo <[email protected]>

src/types.ts

@@ -2,7 +2,7 @@ import * as React from 'react';
 import { TextStyle, ViewStyle } from 'react-native';
 
 export interface ActionSheetProps {
-  showActionSheetWithOptions: (options: ActionSheetOptions, callback: (i: number) => void) => void;
+  showActionSheetWithOptions: (options: ActionSheetOptions, callback: (i: number) => void | Promise<void>) => void;
 }
 
 // for iOS