message: Make non_exhaustive
diff: @@ -10,6 +10,7 @@ use snafu::Snafu;
  #[derive(Debug, Serialize, Deserialize, Snafu, JsonSchema)]
  #[snafu(visibility = "pub(crate)")]
  #[serde(rename_all = "snake_case")]
  +#[non_exhaustive]
  pub enum StdError {
  #[snafu(display("Contract error: {}", msg))]
  DynContractErr {
  