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:ip:20170304

Latest report for fcpauldiaz/gobhash-backend:
https://snyk.io/test/github/fcpauldiaz/gobhash-backend
GobHash/GobHash-Backend,GobHash/GobHash-Backend