feat: fix the bug that add_policies does not update policy_map (#390)

Author: Chimou0

casbin/model/policy.py

@@ -154,7 +154,7 @@ def add_policies(self, sec, ptype, rules):
                 return False
 
         for rule in rules:
-            self[sec][ptype].policy.append(rule)
+            self.add_policy(sec, ptype, rule)
 
         return True