Update casbin to v1.1.0.

[PsiACE]

Fixed errors like this

   |
17 |     if let Ok(authorized) = e.enforce(&[name, "data", action]).await {
   |                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `std::future::Future` is not implemented for `std::result::Result<bool, casbin::error::Error>`

Just remove .await. Everything else is normal.

Close #21

[hsluoyz]

@GopherJ @hackerchai

[hackerchai]

lgtm. Thanks!