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Added PR links for 2.2.0 changelog entries.

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Nicolás Venturo
2019-02-26 13:19:51 -03:00
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CHANGELOG.md
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## 2.2.0 (unreleased) ## 2.2.0 (unreleased)
### New features: ### New features:
* `ERC20`: added internal `_approve(address owner, address spender, uint256 value)`, allowing derived contracts to set the allowance of arbitrary accounts. * `ERC20`: added internal `_approve(address owner, address spender, uint256 value)`, allowing derived contracts to set the allowance of arbitrary accounts. ([#1609](https://github.com/OpenZeppelin/openzeppelin-solidity/pull/1609))
* `ERC20Metadata`: added internal `_setTokenURI(string memory tokenURI)`. * `ERC20Metadata`: added internal `_setTokenURI(string memory tokenURI)`. ([#1618](https://github.com/OpenZeppelin/openzeppelin-solidity/pull/1618))
* `ERC20Snapshot`: create snapshots on demand of the token balances and total supply, to later retrieve and e.g. calculate dividends at a past time. * `ERC20Snapshot`: create snapshots on demand of the token balances and total supply, to later retrieve and e.g. calculate dividends at a past time. ([#1617](https://github.com/OpenZeppelin/openzeppelin-solidity/pull/1617))
### Improvements: ### Improvements:
* Upgraded the minimum compiler version to v0.5.2: this removes many Solidity warnings that were false positives. * Upgraded the minimum compiler version to v0.5.2: this removes many Solidity warnings that were false positives. ([#1606](https://github.com/OpenZeppelin/openzeppelin-solidity/pull/1606))
* `Counter`'s API has been improved, and is now used by `ERC721` (though it is still in `drafts`). * `Counter`'s API has been improved, and is now used by `ERC721` (though it is still in `drafts`). ([#1610](https://github.com/OpenZeppelin/openzeppelin-solidity/pull/1610))
* `ERC721`'s transfers are now more gas efficient due to removal of unnecessary `SafeMath` calls. * `ERC721`'s transfers are now more gas efficient due to removal of unnecessary `SafeMath` calls. ([#1610](https://github.com/OpenZeppelin/openzeppelin-solidity/pull/1610))
* Fixed variable shadowing issues. * Fixed variable shadowing issues. ([#1606](https://github.com/OpenZeppelin/openzeppelin-solidity/pull/1606))
### Bugfixes: ### Bugfixes:
### Breaking changes: ### Breaking changes:
* `TokenMetadata` (in drafts) has been renamed to `ERC20Metadata`. * `TokenMetadata` (in drafts) has been renamed to `ERC20Metadata`. ([#1618](https://github.com/OpenZeppelin/openzeppelin-solidity/pull/1618))
## 2.1.2 (2019-17-01) ## 2.1.2 (2019-17-01)
* Removed most of the test suite from the npm package, except `PublicRole.behavior.js`, which may be useful to users testing their own `Roles`. * Removed most of the test suite from the npm package, except `PublicRole.behavior.js`, which may be useful to users testing their own `Roles`.