minor changes

README.md

@@ -71,17 +71,17 @@ AnimatedToggleSwitch<int>.rolling(
 ```
 
 ### Simple rolling animation with loading
-To use the loading animation, you simply have to return a future in `onChanged` or `onTap`.
+To use the loading animation, you simply have to return a `Future` in `onChanged` or `onTap`.
 You can alternatively control the loading manually with the `loading` parameter.  
 Hence, to disable the loading animation, `loading: false` must be set.
 
 ```dart
 AnimatedToggleSwitch<int>.rolling(
   current: value,
   values: [0, 1, 2, 3],
-  onChanged: (i) {
+  onChanged: (i) async {
     setState(() => value = i);
-    return Future.delayed(Duration(seconds: 3));
+    await Future.delayed(Duration(seconds: 3));
   },
   loading: false, // for deactivating loading animation
   iconBuilder: iconBuilder,

pubspec.yaml

@@ -1,5 +1,5 @@
 name: animated_toggle_switch
-description: Simple and animated toggle switch for multiple choices and loading animation. It's a good alternative if you don't want to use something like a dropdown menu.
+description: Simple and animated switch with multiple choices and smooth loading animation. It's a good alternative if you don't want to use something like a dropdown menu.
 version: 0.6.1
 repository: https://github.com/SplashByte/animated_toggle_switch