Animated WSprite never displays the last frame

[fin444]

Describe the bug
WSprites with multiple frames never render the last frame.

To Reproduce
Steps to reproduce the behavior:

1. Create a WSprite with an animation.
2. Look at it.

Version of the (please complete the following information):

• Mod: 5.2.0+1.18
• Fabric API: 0.44.0+1.18
• Minecraft: 1.18.1

Additional context
This may be caused by the following if statement:

LibGui/src/main/java/io/github/cottonmc/cotton/gui/widget/WSprite.java

Line 205 in bfdde6e

if (currentFrame >= frames.length - 1) {

It goes back to the 0th frame immediately if the currentFrame is the last frame, rather than one greater than the last frame.