message: doc(depreacted) Fix an example.
diff: use std::{error, fmt};
  -use wasmer_runtime::{compile, imports, wat2wasm, Ctx, Func, RuntimeError};
  +use wasmer_runtime::{compile, error::RuntimeError, imports, wat2wasm, Ctx, Func};
  static WAT: &'static str = r#"
  (module
  