Whether async is supported？

[kevinkelin]

pycasbin has already support Async Enforcer, so does this repo has a plan to support async?

[casbin-bot]

@techoner @Nekotoxin

[kevinkelin]

I check pycasbin code, the problem is not redis-watcher，because in AsyncInternalEnforcer,

  if self.watcher and self.auto_notify_watcher:
      if callable(getattr(self.watcher, "update_for_add_policy", None)):
          self.watcher.update_for_add_policy(sec, ptype, rule)
      else:
          self.watcher.update()

self.watcher.update_for_add_policy(sec, ptype, rule) is not the way call async func

so, close this issue!