title: 'ngx-datatable-column' is not a known element - Angular 8 ngx-datatable
body: <p>I am trying to create a sample applicaiton with Angular 8 and using ngx-datatable.
  I am constantly getting error 'ngx-datatable-column' is not a known element. I have already tried solutions like importing NgxDatatableModule into child component instead of appModule or restarting system after installation. It's still there. I am using all latest versions:</p>
  
  <p>"@angular/core": "8.2.6",
  "@swimlane/ngx-datatable": "^16.0.3",
  NVM Node:  12.16.1</p>
  
  <p>app.module.ts :</p>
  
  <pre><code>import { NgxDatatableModule } from '@swimlane/ngx-datatable';
  
  @NgModule({
    declarations: [
      AppComponent,
      LandingComponent
    ],
    imports: [
      BrowserAnimationsModule,
      BrowserModule,
      [NgxDatatableModule],
      RouterModule.forRoot(routes, {useHash: true}),
      SiLandingPageModule,
      SharedModule,
      HttpClientModule,
      TranslateModule.forRoot({
        loader: {
          provide: TranslateLoader,
          useFactory: (createTranslateLoader),
          deps: [HttpClient]
        }
      })
    ],
    exports: [RouterModule],
    bootstrap: [AppComponent]
  })
  </code></pre>
  
  <p>Component file is exactly like given here : <a href="https://github.com/swimlane/ngx-datatable/blob/master/src/app/basic/inline.component.ts" rel="nofollow noreferrer">https://github.com/swimlane/ngx-datatable/blob/master/src/app/basic/inline.component.ts</a></p>