{
  "exec": "/home/mike/electron/latest/electron dist",
  "ext": "css,js,json,html",
  "watch": "dist"
}

{
  "exec": "electron dist",
  "ext": "css,js,json,html",
  "watch": "dist"
}

Use electron on PATH (instead of a hard-coded path).
Use electron on PATH (instead of a hard-coded path).
