fix: package.json to reduce vulnerabilities
fix: package.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/npm:hoek:20180212

Latest report for kelektiv/node.bcrypt.js:
https://snyk.io/test/github/kelektiv/node.bcrypt.js
kelektiv/node.bcrypt.js,kelektiv/node.bcrypt.js,ncb000gt/node.bcrypt.js,ncb000gt/node.bcrypt.js,kelektiv/node.bcrypt.js,kelektiv/node.bcrypt.js,kelektiv/node.bcrypt.js,ncb000gt/node.bcrypt.js,ncb000gt/node.bcrypt.js