Support image animation interpolation

[todo]

Quiver/imageviewer/src/main/kotlin/com/deflatedpickle/imageviewer/ImageViewerPlugin.kt

Lines 35 to 40 in bdceb41

	// TODO: Support image animation interpolation
	object ImageViewerPlugin {
	private val extensionSet = setOf(
	"png",
	"jpg", "jpeg"
	)

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This issue was generated by todo based on a TODO comment in bdceb41. It's been assigned to @DeflatedPickle because they committed the code.