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 carl-utter/rest-api:
https://snyk.io/test/github/carl-utter/rest-api
carl-utter/rest-api,carl-utter/rest-api