message: Make U128 overflow panic msg a bit more consistent
diff: use primitive_types::U256;
  use schemars::JsonSchema;
  use serde::{de, ser, Deserialize, Deserializer, Serialize};
  -use std::convert::TryFrom;
  +use std::convert::{TryFrom, TryInto};
  use std::fmt::{self};
  use std::iter::Sum;
  use std::ops;
  @@ -233,7 +233,9 @@ impl Uint128 {
  if denominator == 0 {
  panic!("Denominator must not be zero");
  }
  - let val = (self.full_mul(numerator) / denominator).as_u128();
  + let val: u128 = (self.full_mul(numerator) / denominator)
  + .try_into()
  + .expect("multiplication overflow");
  Uint128::from(val)
  }
  