Updating dashbook and adding an example with info (#779)

examples/lib/stories/animations/animations.dart

@@ -6,12 +6,43 @@ import 'animation_group.dart';
 import 'aseprite.dart';
 import 'basic.dart';
 
+const basicInfo = '''
+Basic example of `SpriteAnimation`s use in Flame's `BaseGame`
+
+The snippet shows how an animation can be loaded and added to the game
+```
+class MyGame extends BaseGame {
+  @override
+  Future<void> onLoad() async {
+    final animation = await loadSpriteAnimation(
+      'animations/chopper.png',
+      SpriteAnimationData.sequenced(
+        amount: 4,
+        textureSize: Vector2.all(48),
+        stepTime: 0.15,
+      ),
+    );
+
+    final animationComponent = SpriteAnimationComponent(
+      animation: animation,
+      size: Vector2.all(100.0),
+    );
+
+    add(animationComponent);
+  }
+}
+```
+
+On this example, click or touch anywhere on the screen to dynamically add animations
+''';
+
 void addAnimationStories(Dashbook dashbook) {
   dashbook.storiesOf('Animations')
     ..add(
       'Basic Animations',
       (_) => GameWidget(game: BasicAnimations()),
       codeLink: baseLink('animations/basic.dart'),
+      info: basicInfo,
     )
     ..add(
       'Group animation',

examples/lib/stories/animations/basic.dart

@@ -5,17 +5,14 @@ import 'package:flame/game.dart';
 import 'package:flame/gestures.dart';
 
 class BasicAnimations extends BaseGame with TapDetector {
-  late Image chopper;
   late Image creature;
-  late SpriteAnimation animation;
 
   @override
   Future<void> onLoad() async {
-    chopper = await images.load('animations/chopper.png');
     creature = await images.load('animations/creature.png');
 
-    animation = SpriteAnimation.fromFrameData(
-      chopper,
+    final animation = await loadSpriteAnimation(
+      'animations/chopper.png',
       SpriteAnimationData.sequenced(
         amount: 4,
         textureSize: Vector2.all(48),

examples/pubspec.yaml

@@ -11,14 +11,14 @@ environment:
 dependencies:
   flame:
     path: ../packages/flame
-  dashbook: 0.1.1
+  dashbook: 0.1.2
   flutter:
     sdk: flutter
 
 dev_dependencies:
   flutter_test:
     sdk: flutter
-  dart_code_metrics: ^2.4.0
+  dart_code_metrics: ^3.1.0
 
 flutter:
   uses-material-design: true