* feat: use extcodesize for isContract to reduce gas

* feat: add changelog entry

Co-authored-by: Renovate Bot <bot@renovateapp.com>

* add readme notices

* remove period after url

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

Co-authored-by: pm_468 <oleg.kuzmenko@lindenvalley.de>

Bumps [mocha](https://github.com/mochajs/mocha) from 7.2.0 to 8.0.1.
- [Release notes](https://github.com/mochajs/mocha/releases)
- [Changelog](https://github.com/mochajs/mocha/blob/master/CHANGELOG.md)
- [Commits](https://github.com/mochajs/mocha/compare/v7.2.0...v8.0.1)

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

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

* update for ERC20PresetMinterPauser

* fix erc20 supply guide to use hooks

(cherry picked from commit 242400e9)

* fix links to overloaded functions

* fix Address xrefs

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

* feat: add wrapper function for low level calls

* add error message parameter

* adding unit tests and required mocks

* implement error message on SafeERC20

* fixed variable name in tests

* Add missing tests

* Improve docs.

* Add functionCallWithValue

* Add functionCallWithValue

* Skip balance check on non-value functionCall variants

* Increase out of gas test timeout

* Fix compile errors

* Apply suggestions from code review

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

* Add missing tests

* Add changelog entry

Co-authored-by: Nicolás Venturo <nicolas.venturo@gmail.com>
Co-authored-by: Francisco Giordano <frangio.1@gmail.com>

* Make holder fns public

* Add context, remove msg.sender from check

* Fix location of Holder arguments

* Add beforeTransfer hook

* Minor test improvements

* Add ERC1155Burnable and tests

* Add ERC1155Pausable

* Add ERC1155PresetMinterPauser.sol

* Add uri constructors

* Improved revert reasons

* Initial docs improvements

* Add missing docs

* Improve acceptance checks revert reasons

* Apply suggestions from code review

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

* Remove note about 1155 preset uri in mint

* Add rquirements to balanceOfBatch

* Add note about URI and uri

* Fix list in docs

* Fix lint errors

* Use natural sorting for API titles

* Fix doc references

* Escape {id} references to remove docgen warnings

* Added intro docs, fixed links

* Apply suggestions from code review

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

* Add changelog entry

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

(cherry picked from commit 56de324a)

* Adds / Updates documentation of ERC721 contract

* Improve ERC721Burnable documentation

* Fix typo

* Revert changes on ERC721 private functions

* Add documentation to the ERC721 contract's constructor

* Add IERC721Receiver & ERC721Holder documentations

* Add references to IERC721 functions

* Add references to IERC721Metadata/Receiver

* PR fixes

* Fixes to ERC721 documentation

* Add missing fixes

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

* Deprecate SafeERC20.safeApprove

* Add changelog entry

Bumps [websocket-extensions](https://github.com/faye/websocket-extensions-node) from 0.1.3 to 0.1.4. **This update includes a security fix.**
- [Release notes](https://github.com/faye/websocket-extensions-node/releases)
- [Changelog](https://github.com/faye/websocket-extensions-node/blob/master/CHANGELOG.md)
- [Commits](https://github.com/faye/websocket-extensions-node/compare/0.1.3...0.1.4)

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

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

Bumps [acorn](https://github.com/acornjs/acorn) from 6.4.0 to 6.4.1. **This update includes security fixes.**
- [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>

* feature: setting sublevel test scenario for AddressSet

* feat: adding tests for EnumerableSet.UintSet

* feat: adding Behavior and AddressSet and UintSet tests

* Initial ERC1155 implementation with some tests (#1803)

* Initial ERC1155 implementation with some tests

* Remove mocked isERC1155TokenReceiver

* Revert reason edit nit

* Remove parameters associated with isERC1155TokenReceiver call

* Add tests for approvals and single transfers

* Add tests for transferring to contracts

* Add tests for batch transfers

* Make expectEvent.inTransaction tests async

* Renamed "owner" to "account" and "holder"

* Document unspecified balanceOfBatch reversion on zero behavior

* Ensure accounts can't set their own operator status

* Specify descriptive messages for underflow errors

* Bring SafeMath.add calls in line with OZ style

* Explicitly prevent _burn on the zero account

* Implement batch minting/burning

* Refactored operator approval check into isApprovedForAll calls

* Renamed ERC1155TokenReceiver to ERC1155Receiver

* Added ERC1155Holder

* Fix lint issues

* Migrate tests to @openzeppelin/test-environment

* port ERC1155 to Solidity 0.6

* make ERC1155 constructor more similar to ERC721 one

* also migrate mock contracts to Solidity 0.6

* mark all non-view functions as virtual

* add simple catch-all implementation for the metadata URI interface

* include an internal function to set the URI so users can implement functionality to switch URIs

* add tests for ERC1155 metadata URI

* fix nits, mostly pointed out by linter

* convert ERC1155 metadata URI work to Solidity 0.6

* mark all non-view functions as virtual

* Port ERC 1155 branch to Solidity 0.6 (and current master) (#2130)

* port ERC1155 to Solidity 0.6

* make ERC1155 constructor more similar to ERC721 one

* also migrate mock contracts to Solidity 0.6

* mark all non-view functions as virtual

* Update contracts/token/ERC1155/IERC1155MetadataURI.sol

Starting on Solidity v0.6.2, interfaces can now inherit. \o/

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

* Fix compile errors

* Remove URI event

* Merge MetadataCatchAll into ERC1155

* Improve documentation.

* Simplify tests

* Move tests into ERC1155 tests

* Update documentation

* Bump minimum compiler version for inteface inheritance

* Fix holder tests

* Improve setUri docs

* Fix docs generation

Co-authored-by: Alan Lu <alanlu1023@gmail.com>
Co-authored-by: Nicolás Venturo <nicolas.venturo@gmail.com>
Co-authored-by: Francisco Giordano <frangio.1@gmail.com>

* update test-helpers to 0.5.6-rc.0

* remove comment that no longer applies

* fix uses of expectEvent.notEmitted

* remove mocha only

* update to final version

* Update test/token/ERC777/ERC777.test.js

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

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

* Make receiver functions private

* Make external functions public