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:querystringify:20180419

Latest report for jakesidsmith/krawala:
https://snyk.io/test/github/jakesidsmith/krawala
JakeSidSmith/krawala,JakeSidSmith/krawala,JakeSidSmith/krawala