nyc/test/fixtures/conf-multiple-extensions/package.json

{
  "name": "nyc",
  "version": "1.1.1",
  "description": "forking code-coverage using istanbul.",
  "main": "index.js",
  "bin": {
    "nyc": "./bin/nyc.js",
    "nyc-report": "./bin/nyc-report.js"
  },
  "nyc": {
    "exclude": [
      "**/blarg",
      "**/blerg"
    ],
    "extension": [".es6", ".foo.BAR"]
  }
}