message: Do not set `no_std` when `std` feature is enabled for `casper-types`
diff: //! Types used to allow creation of Wasm contracts and tests for use on the Casper Platform.
  #![cfg_attr(
  - not(any(feature = "json-schema", feature = "datasize", feature = "gens", test)),
  + not(any(
  + feature = "json-schema",
  + feature = "datasize",
  + feature = "gens",
  + feature = "std",
  + test,
  + )),
  no_std
  )]
  #![doc(html_root_url = "https://docs.rs/casper-types/1.4.2")]
  