Kyber utils v2.1.2 - Minor fix to use OpenZeppelin packages
Instead of using a cloned version of the @OpenZeppelin packages in the zeppelin dir, this release removes them and uses the official @OpenZeppelin packages. More details:
- Added decimals() to IERC20 interface, extending it from @OpenZeppelin faf5b3e
- Fix @openzeppelin/contracts version to 3.2.0 3489d6e
- Changes to use dependencies from @openzeppelin/contracts instead of forking the contracts 9fa7dec