Disable render offscreen

Disable render to texture (but not animation) when Spine object is offscreen.

Animation track support

Animation track support (start, stop, set, delete animations on different tracks, alpha (animation blending) support per track.
Add events and complete listener for default animation on start
Add isSkeletonLoaded ACE
Add error handling for skeleton not available and skin does not exist (output to console when debug is enabled, do not cause JS error.)

Module support, render rate

Add Construct 3 R266 Module support.
Add render rate (ticks per render, distributed across instances of the Spine object).

Add Set animation mix {fromName} to {toName} with duration {seconds}.

Add Set animation mix {fromName} to {toName} with duration {seconds}.

Add SpineBBoxGetPoly expression

Add SpineBBoxGetPoly expression returns poly points in JSON format of named slot/bounding box attachment.

Add SpineCenterBBox ACEs and debug property

Add debug property, SpineBBoxCenterX,Y expressions. UpdateBBoxes action.

Add updateWorldTransform on animation set

Add updateWorldTransform on animation set.

Do not fire past events for Set Animation at Starting Time

Change behavior of Set Animation w/ starting time to not trigger events if the events were before the starting time.

Fix slot color bug

Fix slot color to operate on slot color object instead of creating new ref

Add slot dark color, play from time, set time

1.16.0 Add Set slot dark color, Apply Slot color, Reset Slot color. Add Set animation time and starting point of Set animation (beginning, current time, current ratio). Deprecated set color attachment (did not support dark color).