watch for changes is only on a folder level. we need to watch a file.

[sdetweil]

I use the json file to start an app

{
  "apps" : [{
    "name"        : "MagicMirror",
    "script"      : "/home/pi/MagicMirror/installers/mm.sh",
    "watch"       : ["/home/pi/MagicMirror/config/config.js"]
  }]
}

the older watch support provided for a list of files.. now it is watch this root folder.
but file changes are not replicated to the folder.. only file/directory intersions/removals. .

so pm2 doesn't get file change notices anymore..

magicmirror/config/config.js <---- that is the file we want to watch
magicmirror is the root, config as the root doesn't change the results.

is there something I am missing? tested on ubuntu, raspi os, and macos