Make decorator dependency loosely constrained

pyproject.toml

@@ -28,7 +28,7 @@ pandas = ">=2.2.2"
 scikit-learn = ">=1.4.2"
 celluloid = ">=0.2.0"
 igraph = ">=0.11.4"
-decorator = "^5.1.1"
+decorator = ">=5.1.1"
 
 [tool.poetry.group.widget]
 optional = true