Proxy Handler トラップメソッドの修正

[segayuu]

機械翻訳なので自然に読めるように。 実装表・タグ付けの更新もしてます。

• [ ] https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/Proxy/handler
• [ ] https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/Proxy/handler/getPrototypeOf
• [ ] https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/Proxy/handler/isExtensible
• [ ] https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/Proxy/handler/preventExtensions
• [ ] https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/Proxy/handler/getOwnPropertyDescriptor
• [ ] https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/Proxy/handler/defineProperty
• [ ] https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/Proxy/handler/has
• [ ] https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/Proxy/handler/get
• [ ] https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/Proxy/handler/set

[segayuu]

機械翻訳時以降に追加された"例"セクションの翻訳は後回しです・・・

• [ ] https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/Proxy/handler/setPrototypeOf