feat: adding default constructor on SvgComponent (#1334)

* feat: adding default constructor on SvgComponent

* fixing flame version

* svg not final anymore

* pr suggestions

packages/flame_svg/lib/svg_component.dart

@@ -7,18 +7,51 @@ import './svg.dart';
 /// Wraps [Svg] in a Flame component.
 class SvgComponent extends PositionComponent {
   /// The wrapped instance of [Svg].
-  Svg svg;
+  Svg? svg;
 
-  /// Creates an [SvgComponent] from an [Svg] instance.
-  SvgComponent.fromSvg(
-    this.svg, {
+  /// Creates an [SvgComponent]
+  SvgComponent({
+    this.svg,
     Vector2? position,
     Vector2? size,
+    Vector2? scale,
+    double? angle,
+    Anchor? anchor,
     int? priority,
-  }) : super(position: position, size: size, priority: priority);
+  }) : super(
+          position: position,
+          size: size,
+          scale: scale,
+          angle: angle,
+          anchor: anchor,
+          priority: priority,
+        );
+
+  /// Creates an [SvgComponent] from an [Svg] instance.
+  @Deprecated(
+    'Will be removed on future versions, use the default '
+    'constructor instead',
+  )
+  SvgComponent.fromSvg(
+    Svg svg, {
+    Vector2? position,
+    Vector2? size,
+    Vector2? scale,
+    double? angle,
+    Anchor? anchor,
+    int? priority,
+  }) : this(
+          svg: svg,
+          position: position,
+          size: size,
+          scale: scale,
+          angle: angle,
+          anchor: anchor,
+          priority: priority,
+        );
 
   @override
   void render(Canvas canvas) {
-    svg.render(canvas, size);
+    svg?.render(canvas, size);
   }
 }