Nested slug Packages

➔ Schema-based slug plugin for Mongoose ✓ single⋮compound ✓ unique within collection⋮group ✓ nested docs⋮arrays ✓ relative⋮abs paths ✓ sync on change: create⋮save⋮update⋮updateOne⋮updateMany⋮findOneAndUpdate ✓ $set operator ✓ counter⋮shortId