chore(package): update joi to version 9.1.1
chore(package): update joi to version 9.1.1

https://greenkeeper.io/
rcaracaus/pa11y-api,sebasalvarado/dementia-hacks-api,KunalKapadia/express-mongoose-es6-rest-api,wen911119/my-node-api,maratgaip/MusicApi,KunalKapadia/express-mongoose-es6-rest-api,kenzanboo/mail,ssmlee04/docker-user-module,ssmlee04/docker-user-module