Bumps [@openzeppelin/test-environment](https://github.com/OpenZeppelin/openzeppelin-test-environment) from 0.1.3 to 0.1.4.
- [Release notes](https://github.com/OpenZeppelin/openzeppelin-test-environment/releases)
- [Changelog](https://github.com/OpenZeppelin/openzeppelin-test-environment/blob/master/CHANGELOG.md)
- [Commits](https://github.com/OpenZeppelin/openzeppelin-test-environment/compare/v0.1.3...v0.1.4)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

Bumps [@openzeppelin/cli](https://github.com/OpenZeppelin/openzeppelin-sdk) from 2.8.1 to 2.8.2.
- [Release notes](https://github.com/OpenZeppelin/openzeppelin-sdk/releases)
- [Commits](https://github.com/OpenZeppelin/openzeppelin-sdk/compare/v2.8.1...v2.8.2)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

* Remove isConstructor requirement from _setupRole

* Remove isConstructor requirement from _setupDecimals

* Update contracts/access/AccessControl.sol

Co-Authored-By: Francisco Giordano <frangio.1@gmail.com>

Co-authored-by: Francisco Giordano <frangio.1@gmail.com>

* Fix deprecation warnings

* Workaround linter bug

* rename Strings.fromUint256 to Strings.toString

* add changelog entry

* fix conflict with js toString method

* Improve ERC20/721 Pausable docs

* Add ERC20Pausable mint and burn tests

* Add ERC721Pausable mint and burn tests

* Add _beforeTransfer hook in ERC777 to mint and burn

* provide 'automatic' token URI by appending the token ID to the base URI, if a base is set but no token-specific URI is available

* make the three cases more explicit, avoid else after return

* adjust comments to reflect reality

Co-authored-by: Nicolás Venturo <nicolas.venturo@gmail.com>

Bumps [@openzeppelin/cli](https://github.com/OpenZeppelin/openzeppelin-sdk) from 2.8.0 to 2.8.1.
- [Release notes](https://github.com/OpenZeppelin/openzeppelin-sdk/releases)
- [Commits](https://github.com/OpenZeppelin/openzeppelin-sdk/compare/v2.8.0...v2.8.1)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

Bumps [solhint](https://github.com/protofire/solhint) from 3.0.0-rc.6 to 3.0.0-rc.7.
- [Release notes](https://github.com/protofire/solhint/releases)
- [Changelog](https://github.com/protofire/solhint/blob/master/CHANGELOG.md)
- [Commits](https://github.com/protofire/solhint/compare/v3.0.0-rc.6...v3.0.0-rc.7)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

* Update access-control.adoc to make compile

Add call to `ERC20("MyToken", "TKN")` in `MyToken` constructor

* Update access-control.adoc to make compile

Add call to `ERC20("MyToken", "TKN")` in `MyToken` constructor

* Update access-control.adoc MyToken formatting

* Update erc20-supply.adoc to make compile

Add call to `ERC20("MyToken", "TKN")` in `ERC20FixedSupply` constructor

* Update erc20-supply.adoc to make compile

Add constructor to `ERC20WithMinerReward`

* Update erc20-supply.adoc to make compile

In `MinerRewardMinter` use `ERC20MinterPauser`

* Update erc20-supply.adoc to make compile

Add constructor and override to `ERC20WithAutoMinerReward`

* Update erc777.adoc to make compile

* Update gsn-strategies.adoc to make compile

* Update gsn-strategies.adoc to make compile

Fix imports, add overrides, and revert reason to `MyContract`

Co-authored-by: Nicolás Venturo <nicolas.venturo@gmail.com>

* Add ERC20DeployReady

* Add ERC721DeployReady

* Improve docs

* Fix linter errors

* Rename DeployReady contracts to MinterPauser, add docs

* Fix deploy ready docs

* Minor doc adjustment

* Update docs for ERC20 and ERC721

* Add EnumerableMap to docs

* Update misc guides

* Apply suggestions from code review

Co-Authored-By: Francisco Giordano <frangio.1@gmail.com>

Co-authored-by: Francisco Giordano <frangio.1@gmail.com>

* Implement AddressSet in terms of a generic Set

* Add Uint256Set

* Add EnumerableMap

* Fix wording on EnumerableSet docs and tests

* Refactor ERC721 using EnumerableSet and EnumerableMap

* Fix tests

* Fix linter error

* Gas optimization for EnumerableMap

* Gas optimization for EnumerableSet

* Remove often not-taken if from Enumerable data structures

* Fix failing test

* Gas optimization for EnumerableMap

* Fix linter errors

* Add comment for clarification

* Improve test naming

* Rename EnumerableMap.add to set

* Add overload for EnumerableMap.get with custom error message

* Improve Enumerable docs

* Rename Uint256Set to UintSet

* Add changelog entry

* Merge ERC20Detailed into ERC20, make derived contracts abstract

* Fix Create2 tests

* Fix failing test

* Default decimals to 18

* Add tests for setupDecimals

* Add changelog entry

* Update CHANGELOG.md

* Update CHANGELOG.md

* Replace isConstructor for !isContract

* Update CHANGELOG.md

Co-Authored-By: Francisco Giordano <frangio.1@gmail.com>

Co-authored-by: Francisco Giordano <frangio.1@gmail.com>

* Remove _grantRole and _revokeRole, replace with _setupRole

* Make all external AccessControl functions public

* Remove Ownable._transferOwnership

* Rename ERC721's _safeTransferFrom and _transferFrom to _safeTransfer and _transfer

* Make all ERC721 external functions public

* Make all miscelaneous external functions public instead

* Add changelog entry

* Move calldata arguments to memory

* Update contracts/access/AccessControl.sol

Co-Authored-By: Francisco Giordano <frangio.1@gmail.com>

* Restrict setupRole to the constructor

* Replace isConstructor for !isContract

Co-authored-by: Francisco Giordano <frangio.1@gmail.com>

Bumps [@openzeppelin/cli](https://github.com/OpenZeppelin/openzeppelin-sdk) from 2.7.2 to 2.8.0.
- [Release notes](https://github.com/OpenZeppelin/openzeppelin-sdk/releases)
- [Commits](https://github.com/OpenZeppelin/openzeppelin-sdk/compare/v2.7.2...v2.8.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

* fix mentions of drafts.adoc

* fix 721.adoc

* Add revert if the bytecode length is not greater than zero

* Add value parameter to create2 deploy function

Add tests for contract balance revert and depositing funds

* Change parameter name to amount for clarity

* Fix test for value sending

* Fix linter error

* Change revert reason

* Improve Create2.deploy documentation

* Slight test improvement

* Add changelog entry

Co-authored-by: Nicolás Venturo <nicolas.venturo@gmail.com>

* Add revert reason to EnumerableSet.get.

* Rename EnumerableSet values to keys

* Rename get to at

* Add changelog entry

* Rename keys to values

* Add leading underscore to struct members

* Add IERC721Metadata implementation into ERC721

* Add IERC721Enumerable into ERC721

* Update ERC721Pausable and ERC721Burnable

* Delete ERC721Metadata, ERC721Enumerable and ERC721 (now ERC721)

* Update mocks

* Update tests

* Update contracts/token/ERC721/ERC721.sol

Co-Authored-By: Francisco Giordano <frangio.1@gmail.com>

* Make ERC721Pausable and ERC721Burnable abstract

Co-authored-by: Francisco Giordano <frangio.1@gmail.com>

Bumps [acorn](https://github.com/acornjs/acorn) from 6.4.0 to 6.4.1. **This update includes a security fix.**
- [Release notes](https://github.com/acornjs/acorn/releases)
- [Commits](https://github.com/acornjs/acorn/compare/6.4.0...6.4.1)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

* Upgrade to latest solhint rc

* Add private-vars-leading-underscore linter rule

* Add leading underscore to GSNRecipient constants

* Remove leading underscore from ERC165Checker functions

* Add leading underscore to multiple private constants

* Fix linter errors in mocks

* Add leading underscore to ERC777's ERC1820 registry

* Add changelog entry

* Add signed to unsigned conversion to SafeCast

* Update SafeCast exception message

* Add test for SafeCast int to uint conversion

- Update SafeCastMock
- Add tests for SafeCast int256 to uint256

* Update SafeCast int to uint definition

Apply suggestions from code review.

Co-Authored-By: Nicolás Venturo <nicolas.venturo@gmail.com>

* Update test for SafeCast int to uint conversion

* Update SafeCast test after code review

- Change "downcasts" to "casts"
- Move test closer to its function

* Fix error in SafeCast toUint256 description

* Fix breaking error in SafeCast

* Add uint256 to int256 conversion to SafeCast

- Add function
- Add mock
- Add test

* Update SafeCast unsigned to signed conversion

- Update error in conversion to be more clear
- Update constants in test to be powers of 2 instead of shifts

* Add changelog entry

* Update SafeCast tests

- Add minus in INT256_MIN for clarity

Co-Authored-By: Nicolás Venturo <nicolas.venturo@gmail.com>

Co-authored-by: Nicolás Venturo <nicolas.venturo@gmail.com>