Reinstate "OpenColorIO" in explicit optional dependencies.
@@ -123,7 +123,7 @@ development = [
]
graphviz = [ "pygraphviz" ]
meshing = [ "trimesh" ]
-optional = [ "networkx", "pandas", "scikit-learn", "tqdm" ]
+optional = [ "networkx", "opencolorio", "pandas", "scikit-learn", "tqdm" ]
plotting = [ "matplotlib" ]
read-the-docs = [
"matplotlib",
