Previously, the `ARTrackedImageManager` and `ARTrackedObjectManager` would throw an exception if enabled without a valid reference library. These managers no longer throw; now, they disable themselves. This makes it possible to add one of these managers at runtime, since Unity will automatically invoke `OnEnable` before you have a chance to set a valid reference library. If you create one of these managers at runtime, you will need to set a valid reference library and then re-enable it.
Add `IEquatable` to `TrackableCollection`.
Added support for height scale estimatation for the 3D human body subsystem.
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Bug Fixes
Allow building for WebGL when this package is present. Although ARFoundation does not support WebGL, previously you could not even build an empty scene if the package were present. This has been fixed.
Fixed light estimation when estimate is provided in lumens.
