Re-export RunError from bb8

Author: johnchildren

src/pooled_connection/bb8.rs

@@ -46,6 +46,8 @@ use bb8::ManageConnection;
 
 /// Type alias for using [`bb8::Pool`] with [`diesel-async`]
 pub type Pool<C> = bb8::Pool<AsyncDieselConnectionManager<C>>;
+/// Type alias for using [`bb8::RunError`] with [`diesel-async`]
+pub type RunError<E> = bb8::RunError<E>;
 
 #[async_trait::async_trait]
 impl<C> ManageConnection for AsyncDieselConnectionManager<C>