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:growl:20160721

Latest report for pjmolina/event-backend:
https://snyk.io/test/github/pjmolina/event-backend

Some vulnerabilities weren't fixed or ignored, and so will still fail
the Snyk test report.
pjmolina/event-backend,pjmolina/event-backend,pjmolina/event-backend