chore(package): update mongoose to version 4.8.1 (#286)
chore(package): update mongoose to version 4.8.1 (#286)

Closes #281

https://greenkeeper.io/
mongoosastic/mongoosastic,guumaster/mongoosastic,mongoosastic/mongoosastic,guumaster/mongoosastic,mongoosastic/mongoosastic,guumaster/mongoosastic