* 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>