Bump version to 0.3.1

PiperOrigin-RevId: 446286131

Author: claudiofantacci

dm_pix/__init__.py

@@ -20,7 +20,7 @@
 from dm_pix._src import metrics
 from dm_pix._src import patch
 
-__version__ = "0.3.0"
+__version__ = "0.3.1"
 
 # Augmentations.
 adjust_brightness = augment.adjust_brightness