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:20180202

Latest report for hypery2k/angular-invocation-handler:
https://snyk.io/test/github/hypery2k/angular-invocation-handler
hypery2k/angular-invocation-handler