ArrayTools to prevent cyclic ref

src/Bones/bone.ts

@@ -1,7 +1,7 @@
 import { Skeleton } from "./skeleton";
 
 import { Vector3, Quaternion, Matrix, Space } from "Math/math";
-import { Tools } from "Tools/tools";
+import { ArrayTools } from "Tools/arrayTools";
 import { Nullable } from "types";
 import { Animation } from "Animations/animation";
 import { AnimationPropertiesOverride } from "Animations/animationPropertiesOverride";