.eslintrc.json

{
    "parser": "@typescript-eslint/parser",
    "env": {
        "node": true,
        "es6": true
    },
    "plugins": ["@typescript-eslint", "jest"],
    "extends": ["plugin:@typescript-eslint/recommended", "eslint:recommended"],
    "parserOptions": {
        "sourceType": "module",
        "ecmaVersion": 2018
    },
    "rules": {
        "linebreak-style": ["error", "unix"],
        "quotes": ["error", "single"],
        "semi": ["error", "always"],
        "no-unused-vars": 0,
        "@typescript-eslint/no-non-null-assertion": "off",
        "@typescript-eslint/no-explicit-any": "off",
        "@typescript-eslint/no-var-requires": "off",
        "@typescript-eslint/no-unused-vars": [
            "warn",
            { "varsIgnorePattern": "^_", "argsIgnorePattern": "^_" }
        ]
    },
    "overrides": [
        {
            "files": "*.js",
            "rules": {
                "@typescript-eslint/explicit-module-boundary-types": "off",
                "@typescript-eslint/no-empty-function": "off",
                "@typescript-eslint/no-unused-vars": "off",
                "@typescript-eslint/no-var-requires": "off"
            }
        },
        {
            "files": "*.test.ts",
            "extends": ["plugin:jest/all"],
            "env": {
                "node": true,
                "es6": true,
                "jest": true
            },
            "rules": {
                "jest/lowercase-name": [
                    "error",
                    {
                        "ignore": ["describe"]
                    }
                ],
                "jest/consistent-test-it": [
                    "warn",
                    {
                        "fn": "test"
                    }
                ],
                "jest/no-hooks": "off",
                "jest/prefer-expect-assertions": "off",
                "jest/prefer-strict-equal": "off"
            }
        }
    ]
}