enhancement: AddDiskWatcher to monitor file date time

[yodamon]

Hi, I would like to request that the AddDiskWatcher .EnsureThat file date and time is comparable to let us know about stale dated files.

[yurii-pelekh]

Hi! I'm not sure if you still need this feature but I've created PR for that warden-stack/Warden.Watchers.Disk#2

[yodamon]

Thank you for getting this done. I will definitely put it to use. 😀

[yurii-pelekh]

You are welcome! But it still need to be reviewed by owner and merged with master branch.