add change log

CHANGELOG.md

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+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
+
+## [0.13] (2022-07-12)
+[0.13]: https://github.com/CoboCustody/cobo-python-api/compare/0.12...0.13
+
+### Added
+- The receiving address list supports paging queries. https://github.com/CoboCustody/cobo-python-api/pull/7
+
+
+## [0.12] (2022-06-27)
+[0.12]: https://github.com/CoboCustody/cobo-python-api/compare/0.11...0.12
+
+### Added 
+- Transaction records can be searched using TXID. https://github.com/CoboCustody/cobo-python-api/pull/6
+
+
+## [0.11] (2022-06-20)
+[0.11]: https://github.com/CoboCustody/cobo-python-api/compare/0.10...0.11
+
+### Fixed
+- Fixed transacitons bug. https://github.com/CoboCustody/cobo-python-api/pull/4, https://github.com/CoboCustody/cobo-python-api/pull/5
+
+
+
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