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openzeppelin-contracts-upgradeable
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Update CHANGELOG.md

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CHANGELOG.md
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### New features ### New features
* `SafeCast.toUintXX`: new library for integer downcasting, which allows for safe operation on smaller types (e.g. `uint32`) when combined with `SafeMath`. ([#1926](https://github.com/OpenZeppelin/openzeppelin-solidity/pull/1926)) * `SafeCast.toUintXX`: new library for integer downcasting, which allows for safe operation on smaller types (e.g. `uint32`) when combined with `SafeMath`. ([#1926](https://github.com/OpenZeppelin/openzeppelin-solidity/pull/1926))
### Improvements
* `ERC777`: `_burn` is now internal, providing more flexibility and making it easier to create tokens that deflate. ([#1908]https://github.com/OpenZeppelin/openzeppelin-contracts/pull/1908))
### Breaking changes ### Breaking changes
* `ERC165Checker` now requires a minimum Solidity compiler version of 0.5.10. ([#1829](https://github.com/OpenZeppelin/openzeppelin-solidity/pull/1829)) * `ERC165Checker` now requires a minimum Solidity compiler version of 0.5.10. ([#1829](https://github.com/OpenZeppelin/openzeppelin-solidity/pull/1829))
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