Fix potential dependency security vulnerability message

[richard-cox]

Github states there's a potential security vulnerability warning for v2. This is due to a dependency of angular cli. They state, of the dependency,

we don't use it, directly or indirectly. NPM isn't smart enough to know this, so shows the vulnerability. For now it's simply a warning. We're working on it

See angular/angular-cli#10480 for more details. We'll monitor this and update when a fix has been merged + released.