Adjust mypy exclusions for .model.material

Don't ignore errors in files from #345, #361

Author: khaeru

pyproject.toml

@@ -117,7 +117,14 @@ files = [
 [[tool.mypy.overrides]]
 module = [
   # TODO Satisfy mypy in the following
-  "message_ix_models.model.material.*",
+  "message_ix_models.model.material.build",
+  "message_ix_models.model.material.data_ammonia_new",
+  "message_ix_models.model.material.data_generic",
+  "message_ix_models.model.material.data_petro",
+  "message_ix_models.model.material.data_steel",
+  "message_ix_models.model.material.data_util",
+  "message_ix_models.model.material.material_demand.*",
+  "message_ix_models.model.material.util",
   "message_ix_models.model.water.*",
   # Legacy codes that may not be type hinted
   "message_ix_models.report.legacy.*",