4.0.0: ESLint configuration is invalid: - Unexpected top-level property "ecmaFeatures"

Tell us about your environment

• ESLint Version: 4.0.0
• Node Version: 6.11.0
• npm Version: 5.0.3

What parser (default, Babel-ESLint, etc.) are you using? default

Please show your full configuration:

.eslintrc.json

{
    "extends": [
        "./eslintDefaults.json"
	]
}

eslintDefaults.json

{
    "parserOptions": {
        "ecmaVersion": 8
    },
	"env": {
        "es6": true
    },
    "extends": "eslint:recommended",
    "globals": {
    },
    "plugins": [
    ],
    "rules": {
    }
}

What did you do? Please include the actual source code causing the issue.

What did you expect to happen?

What actually happened? Please include the actual, raw output from ESLint.

Error: D:\MyDev\ljs_app\trunk\periscope\build\test\selenium\public\.eslintrc:
        ESLint configuration is invalid:
        - Unexpected top-level property "ecmaFeatures".

[westy92]

Looking here, they nested ecmaFeatures under parserOptions.

[metacortex]

eslint v4 is not yet supported in eslint-config-airbnb and eslint-config-airbnb-base. https://github.com/airbnb/javascript/issues/1447