節點 JS 意外字符#。班級：export class Test{    #parent = null;    #name = null;    constructor(name, parent) {        this.#name = name;        if (parent) {            this.#parent = parent;        }    }}.babelrc：{  "presets": [    "@babel/preset-env"  ]}包.json："start": "babel-node"我正在運行腳本“開始”并收到此錯誤：SyntaxError: Unexpected character '#' (9:4)   7 |    8 | export class Test{>  9 |     #parent = null;     |     ^  10 |     #name = null;版本：-"@babel/core": "^7.8.7",-"@babel/node": "^7.8.7",-"@babel/preset-env": "^7.8.7",-node: v12.16.2-npm: 6.14.4怎么修？