Update Angular Dependencies

[MichaelMalony]

Any chance we could get the Angular peer dependencies upped to build with Angular 5+ without npm warnings?

Maybe something like:

"@angular/common": ">= 4.4.6 <= 5.x.x",
"@angular/compiler": ">= 4.4.6 <= 5.x.x",
"@angular/core": ">= 4.4.6 <= 5.x.x"

These are the warnings I currently get when using Angular 5:

npm WARN angular2-websocket@0.9.6 requires a peer of @angular/common@^4.4.6 but none is installed. You must install peer dependencies yourself.
npm WARN angular2-websocket@0.9.6 requires a peer of @angular/compiler@^4.4.6 but none is installed. You must install peer dependencies yourself.
npm WARN angular2-websocket@0.9.6 requires a peer of @angular/core@^4.4.6 but none is installed. You must install peer dependencies yourself.

We've been using with Angular 5 without issue (though the websocket usage is by no means exhaustive).