update vector type

Author: timhaywood

src/index.ts

@@ -1,7 +1,7 @@
 export type Points = Vector2D[];
-export type Vector = [number, number, number?];
 export type Vector2D = [number, number];
 export type Vector3D = [number, number, number];
+export type Vector = Vector2D | Vector3D;
 export type Color = [number, number, number, number];
 export interface PathValue {}