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Bump @openzeppelin/contracts-ethereum-package from 2.4.0 to 2.5.0 #72

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Bumps @openzeppelin/contracts-ethereum-package from 2.4.0 to 2.5.0.

Changelog

Sourced from @openzeppelin/contracts-ethereum-package's changelog.

2.5.0 (2020-02-04)

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)
  • ERC721Metadata: added baseURI, which can be used for dramatic gas savings when all token URIs share a prefix (e.g. http://api.myapp.com/tokens/<id>). (#1970)
  • EnumerableSet: new library for storing enumerable sets of values. Only AddressSet is supported in this release. (#2061)
  • Create2: simple library to make usage of the CREATE2 opcode easier. (#1744)

Improvements

  • ERC777: _burn is now internal, providing more flexibility and making it easier to create tokens that deflate. (#1908)
  • ReentrancyGuard: greatly improved gas efficiency by using the net gas metering mechanism introduced in the Istanbul hardfork. (#1992, #1996)
  • ERC777: improve extensibility by making _send and related functions internal. (#2027)
  • ERC721: improved revert reason when transferring tokens to a non-recipient contract. (#2018)

Breaking changes

  • ERC165Checker now requires a minimum Solidity compiler version of 0.5.10. (#1829)
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Maintainer changes

This version was pushed to npm by nventuro, a new releaser for @openzeppelin/contracts-ethereum-package since your current version.


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@dependabot-preview dependabot-preview bot added the dependencies Pull requests that update a dependency file label Apr 1, 2020
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