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 designfrontier/death-to-jquery-presentation:
https://snyk.io/test/github/designfrontier/death-to-jquery-presentation
designfrontier/death-to-jquery-presentation,designfrontier/death-to-jquery-presentation