Inconsistency in `DatasetVersionInfo` model? (Date vs string)

I noticed that in the DatasetVersionInfo model, the timestamps use inconsistent types:

https://github.com/IQSS/dataverse-client-javascript/blob/0043dddf5e7d9358d0dcac176cb8c0f325aab78b/src/datasets/domain/models/Dataset.ts#L25-L32

releaseTime and createTime are represented as Date objects, while lastUpdateTime is represented as an ISO 8601 string and not transformed into a Date object:

https://github.com/IQSS/dataverse-client-javascript/blob/0043dddf5e7d9358d0dcac176cb8c0f325aab78b/src/datasets/infra/repositories/transformers/datasetTransformers.ts#L237-L239

The return values from the Dataverse API for retrieving a dataset version are all consistently ISO 8601 strings:

I was wondering what the reason for this is, or whether this inconsistency should be cleaned up? (If so, I'd be open to opening a PR for that)

从 src/datasets/domain/models/Dataset.ts 中引用的 DatasetVersionInfo 定义以及 src/datasets/infra/repositories/transformers/datasetTransformers.ts 中的转换开始。对比 releaseTime、createTime 和 lastUpdateTime 相对于 Dataverse API 响应的表示方式。完成的标准是，模型和 transformer 对这三个字段都使用明确且一致的时间戳表示方式。