message: fix(runtime-c-api) Update `wasmer_export_func_params_arity` signature.
  The `returns_len` argument type of `wasmer_export_func_returns_params`
  must be `uint32_t` to match the `wasmer_export_func_returns_arity` results,
  so that casts are not required.
diff: @@ -252,7 +252,7 @@ pub unsafe extern "C" fn wasmer_export_func_params(
  pub unsafe extern "C" fn wasmer_export_func_returns(
  func: *const wasmer_export_func_t,
  returns: *mut wasmer_value_tag,
  - returns_len: c_int,
  + returns_len: uint32_t,
  ) -> wasmer_result_t {
  let named_export = &*(func as *const NamedExport);
  let export = &named_export.export;
  