Update pyproject.toml: add animals extra to make deeplabcut an optional dependency

Author: deruyter92

pyproject.toml

@@ -37,14 +37,14 @@ dependencies = [
     "scikit-image>=0.19.0",
     "filterpy>=1.4.5",
     "pandas>=1.0.1",
-    "deeplabcut==3.0.0rc13",
     "huggingface_hub>=0.20.0",
 ]
 
 [project.optional-dependencies]
 dev = ["pytest>=7.0.0", "black>=22.0.0", "flake8>=4.0.0", "isort>=5.10.0"]
 wandb = ["wandb>=0.12.0"]
 viz = ["matplotlib>=3.5.0", "opencv-python>=4.5.0"]
+animals = ["deeplabcut==3.0.0rc13"]
 
 [tool.setuptools]
 include-package-data = true