Bump supported shap version limit

Signed-off-by: Keith Battocchi <kebatt@microsoft.com>

Author: kbattocchi

setup.cfg

@@ -39,7 +39,7 @@ install_requires =
     joblib >= 0.13.0
     statsmodels >= 0.10
     pandas
-    shap >= 0.38.1, < 0.41.0
+    shap >= 0.38.1, < 0.42.0
     lightgbm
 test_suite = econml.tests
 tests_require =