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:angular:20171018

Latest report for mike-goodwin/owasp-threat-dragon:
https://snyk.io/test/github/mike-goodwin/owasp-threat-dragon
mike-goodwin/owasp-threat-dragon,mike-goodwin/owasp-threat-dragon