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:20150315

Latest report for merlosy/webpack-angular-material:
https://snyk.io/test/github/merlosy/webpack-angular-material
merlosy/webpack-angular-material,merlosy/webpack-angular-material