message: Allow dynamic properties for size
  All except Point allowed dynamic size properties, so adjust
  PointTechniqueParams to also allow dynamic properties for size.
  Tested and worked, seems only the typing needed a small update.
diff: @@ -480,7 +480,7 @@ export interface PointTechniqueParams extends BaseTechniqueParams {
  /**
  * Size of point in pixels.
  */
  - size?: number;
  + size?: DynamicProperty<number>;
  /**
  * Whether to enable picking on these points.
  */
  