**Issue description**
running `npm install` throws the following warning:
```
npm WARN @agm/core@1.0.0-beta.5 requires a peer of @angular/common@^5.0.0 || ^6.0.0 but none is installed. You must…
Currently, the app freeze while performing the first phase of the import (listing all the files recursively).
A large portion of this delay in phase 1 is due to `stat`ing all the files to see if th…