Is there a linter that supports private methods and properties in JS?

Question

JavaScript

The project is not very large, but it is completely tied to private methods and properties, we have been using them for about six months. Linter has not been used before.
I tried to install babel-eslint v10, the error falls. Googled, it seems like privacy will be supported from the 11th version. On the only beta of the 11th version, the parser error falls and it's not only me who has a lot of messages on the github that the 11th version is not working.

Answer 1

Pull request that solves the problem: https://github.com/babel/babel-eslint/pull/801

Answer 2

Working config

{
  "parser": "babel-eslint",
  "parserOptions": {
          "ecmaFeatures": {
              "jsx": true,
              "globalReturn": false
          },
          "ecmaVersion": 2020,
          "sourceType": "module",
          "allowImportExportEverywhere": false,

          "requireConfigFile": true

      },
  "plugins": [
    "react",
    "babel"
  ],
  "globals": {
      "Atomics": "readonly",
      "SharedArrayBuffer": "readonly"
  },
  "extends": [
    "eslint:recommended",
    "plugin:jest/recommended"
  ],
  "rules": {
      "no-useless-escape": 0,
      "no-undef": 0,
      "no-extra-semi": 0,
      "no-extra-boolean-cast": 0
  },
  "env": {
      "browser": true,
      "es6": true
  }
}