==================
* (dev) Add tests on Python 3.7 to 3.9 ([71](https://github.com/nolze/msoffcrypto-tool/pull/71))
* (dev) Track poetry.lock ([71](https://github.com/nolze/msoffcrypto-tool/pull/71))
* (BREAKING) Drop Python 2 support ([71](https://github.com/nolze/msoffcrypto-tool/pull/71))
* Raise exception if no encryption type is specified ([70](https://github.com/nolze/msoffcrypto-tool/issues/70))
* Support SHA256, SHA384 hash algorithm (jackydo, [67](https://github.com/nolze/msoffcrypto-tool/pull/67))
* Fix errors for unencrypted documents
* Use absolute imports ([63](https://github.com/nolze/msoffcrypto-tool/pull/63))