.eslintrc.json

{
  "parser": "@typescript-eslint/parser",
  "parserOptions": {
    "project": "./tsconfig.json"
  },
  "plugins": ["@typescript-eslint"],
  "extends": [
    "eslint:recommended",
    "plugin:@typescript-eslint/eslint-recommended",
    "plugin:@typescript-eslint/recommended",
    "plugin:eslint-comments/recommended"
  ],
  "rules": {
    "@typescript-eslint/no-use-before-define": [
      "error",
      { "functions": false }
    ],
    "@typescript-eslint/no-unused-expressions": ["error"],
    "@typescript-eslint/no-floating-promises": [
      "error",
      { "ignoreVoid": true }
    ],
    "@typescript-eslint/strict-boolean-expressions": [
      "error",
      { "allowString": true, "allowNullableString": true, "allowAny": true }
    ],
    "no-unused-expressions": "off",
    "@typescript-eslint/no-explicit-any": ["off"],
    "@typescript-eslint/explicit-module-boundary-types": ["off"]
  },
  "ignorePatterns": ["**/*.js"],
  "overrides": [
    {
      "files": ["tests/**"],
      "rules": {
        "@typescript-eslint/no-unused-expressions": "off"
      }
    }
  ]
}