message: Fix hackatom contract
diff: @@ -5,7 +5,7 @@ use snafu::{OptionExt, ResultExt};
  use cosmwasm::errors::{ContractErr, ParseErr, Result, SerializeErr, Unauthorized};
  use cosmwasm::serde::{from_slice, to_vec};
  use cosmwasm::traits::{Api, Extern, Storage};
  -use cosmwasm::types::{CanonicalAddr, CosmosMsg, HumanAddr, Params, QueryResponse, Response};
  +use cosmwasm::types::{CanonicalAddr, CosmosMsg, HumanAddr, Params, Response};
  #[derive(Serialize, Deserialize, Clone, Debug, PartialEq, JsonSchema)]
  pub struct InitMsg {
  @@ -75,9 +75,9 @@ pub fn handle<S: Storage, A: Api>(
  }
  }
  -pub fn query<S: Storage, A: Api>(_deps: &Extern<S, A>, msg: Vec<u8>) -> Result<QueryResponse> {
  +pub fn query<S: Storage, A: Api>(_deps: &Extern<S, A>, msg: Vec<u8>) -> Result<Vec<u8>> {
  let _msg: QueryMsg = from_slice(&msg).context(ParseErr { kind: "QueryMsg" })?;
  - Ok(QueryResponse::default())
  + Ok(vec![])
  }
  #[cfg(test)]
  