* 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>