message: Re-export the iterators in the root
diff: @@ -228,6 +228,8 @@ impl<T> fmt::Display for TryFromBigIntError<T> {
  pub use crate::biguint::BigUint;
  pub use crate::biguint::ToBigUint;
  +pub use crate::biguint::U32Digits;
  +pub use crate::biguint::U64Digits;
  pub use crate::bigint::BigInt;
  pub use crate::bigint::Sign;
  