Angular 6 Support

Issue description

Currently this package requires @angular/common@^4.0.0 || ^5.0.0 and @angular/core@^4.0.0 || ^5.0.0. I think that the changes are not so relevant, so probably the migration to support angular 6 is easy.

The main issue that I’ve found is about the RxJS change to v6.0.0, where some modules changes the path, so we need to update it.

It also might need the release of a 2.0.0 version, since there are many breaking changes on package dependencies

[jimmykane]

I solved my issues via installing npm install rxjs@6 rxjs-compat@6 --save

as described https://github.com/ReactiveX/rxjs/blob/master/MIGRATION.md

The agm maps breaks with RXJS 6 and it needs the compat module for backwards compatability

[john-hi]

@ukon1990 the angular 6 switched to use webpack 4, which changed behavior while dynamic importing commonjs modules. I don’t know why but snazzy-info-window directive is using dynamic import snazzy-info-window library, that’s why there are one warning and broken snazzy-info-window directive. To fix it https://github.com/SebastianM/angular-google-maps/blob/1a74b3a9670cf4dbf442033a17dea290dfadc408/packages/snazzy-info-window/directives/snazzy-info-window.ts#L228 should be changed to this._nativeSnazzyInfoWindow = new elems[0].default(options); but it is not backward compatibility solution (it won’t work in angular5/webpack3). I don’t know how fix it right.