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**Breaking changes**
- Redesign the API, now we should do ``from aws_arns import api`` instead of ``from aws_arns import ...``.
- Redesign the data class, add ``CrossAccountGlobal``, ``Global``, ``Regional``, ``ResourceIdOnlyRegional``, ``ColonSeparatedRegional``, ``SlashSeparatedRegional``.
**Features and Improvements**
- Add ``iam``, ``batch`` modules.
**Miscellaneous**
- Redesign the testing strategy.