Feature/Polygon Whitelist NFT/update openzeppelin #462
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変更内容
@openzeppelin/contracts
バージョンをv5.0.0に更新背景
@openzeppelin/contractsのv5.0.0リリースに伴い、OwnableのSolidityコンパイラバージョン・仕様が更新されたため
(https://github.com/OpenZeppelin/openzeppelin-contracts/releases/tag/v5.0.0)
ChainIDE上で確認したエラー
v5.0.0
に備考