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:ms:20170412

Latest report for therealshark/outgauge2html:
https://snyk.io/test/github/therealshark/outgauge2html
therealshark/outgauge2html,therealshark/outgauge2html