add constraint for cplex

Author: t-imamichi

setup.py

@@ -73,7 +73,7 @@
     include_package_data=True,
     python_requires=">=3.8",
     extras_require={
-        "cplex": ["cplex"],
+        "cplex": ["cplex; python_version < '3.12'"],
         "cvx": ["cvxpy"],
         "matplotlib": ["matplotlib"],
         "gurobi": ["gurobipy"],