message: Change remaining serde rename_all = "lowercase" -> "snake_case"
diff: @@ -7,7 +7,7 @@ use crate::errors::{Error, SystemError};
  use crate::HumanAddr;
  #[derive(Serialize, Deserialize, Clone, Debug, PartialEq, JsonSchema)]
  -#[serde(rename_all = "lowercase")]
  +#[serde(rename_all = "snake_case")]
  pub enum ApiResult<T, E: std::error::Error = ApiError> {
  Ok(T),
  Err(E),
  