chore(*): update destroyer initialization

src/app/data-entries/dropdown/drop-down-remote-virtual/drop-down-remote.component.ts

@@ -23,7 +23,7 @@ export class DropDownRemoteComponent implements OnInit, OnDestroy, AfterViewInit
     public itemsMaxHeight = 320;
     public prevRequest: Subscription;
     public rData: any;
-    private destroy$ = new Subject();
+    private destroy$ = new Subject<void>();
     constructor(private remoteService: RemoteNWindService, public cdr: ChangeDetectorRef) { }
 
     public ngAfterViewInit() {

src/app/grid/grid-crud-sample/crud-sample.component.ts

@@ -29,7 +29,7 @@ export class CRUDSampleComponent implements OnInit, OnDestroy {
     public noopSortStrategy = NoopSortingStrategy.instance();
 
     private _prevRequest: any;
-    private destroy$ = new Subject<boolean>();
+    private destroy$ = new Subject<void>();
 
     private _perPage = 10;
 

src/app/grid/grid-drop-indicator/grid-drop-indicator.ts

@@ -14,7 +14,7 @@ export class GridDropIndicatorComponent implements AfterViewInit, OnDestroy {
   @ViewChild('grid', { read: IgxGridComponent, static: true })
   public grid: IgxGridComponent;
   public data: any[];
-  private destroy$ = new Subject();
+  private destroy$ = new Subject<void>();
   private intervalSub: Subscription;
   private interval$: Observable<number>;
   private _draggedRow: any;

src/app/grid/grid-keyboardnav-guide-sample/grid-keyboardnav-sample.component.ts

@@ -191,7 +191,7 @@ export class GridKeyboardnavGuide implements OnInit, OnDestroy {
                     'SUMMARY COMBINATIONS' : '';
     }
 
-    private _destroyer = new Subject();
+    private _destroyer = new Subject<void>();
     private _keyboardHandler = new KeyboardHandler([], GridSection.THEAD);
 
     public constructor(private cdr: ChangeDetectorRef) { }

src/app/grid/grid-remote-filtering-sample/remote-filtering-sample.component.ts

@@ -20,7 +20,7 @@ export class RemoteFilteringSampleComponent implements OnInit, AfterViewInit, On
 
     private _prevRequest: any;
     private _chunkSize: number;
-    private destroy$ = new Subject<boolean>();
+    private destroy$ = new Subject<void>();
 
     constructor(private _remoteService: RemoteFilteringService, public cdr: ChangeDetectorRef) { }
 

src/app/hierarchical-grid/hgrid-keybarod-nav-guide-sample/hgrid-keyboard-guide.component.ts

@@ -188,7 +188,7 @@ export class HGridKeyboardnavGuide implements OnInit, OnDestroy {
 
     public gridTarget: GridUnderManagement;
 
-    private _destroyer = new Subject<boolean>();
+    private _destroyer = new Subject<void>();
     private keyboardHandler = new KeyboardHandler([], GridSection.THEAD);
 
     public constructor(
@@ -334,12 +334,12 @@ export class HGridKeyboardnavGuide implements OnInit, OnDestroy {
 
 export class GridUnderManagement {
     public hGrid: IgxHierarchicalGridComponent;
-    public destroyer = new Subject();
+    public destroyer = new Subject<void>();
     public keyboardHandler: KeyboardHandler;
     public cdr: ChangeDetectorRef;
 
     constructor(hGrid: IgxHierarchicalGridComponent, keyboardHandler: KeyboardHandler,
-                destroyer: Subject<boolean>, cdr: ChangeDetectorRef) {
+                destroyer: Subject<void>, cdr: ChangeDetectorRef) {
         this.hGrid = hGrid;
         this.keyboardHandler = keyboardHandler;
         this.destroyer = destroyer;

src/app/hierarchical-grid/hierarchical-grid-editing-events/hierarchical-grid-editing-events.component.ts

@@ -21,7 +21,7 @@ export class HGridEditingEventsComponent implements OnInit, OnDestroy {
 
     public localData: Singer[];
 
-    private destroy$ = new Subject();
+    private destroy$ = new Subject<void>();
 
     constructor() { }
 

src/app/notifications/banner/banner-advanced-sample/banner-advanced-sample.component.ts

@@ -15,7 +15,7 @@ export class BannerAdvancedSampleComponent implements OnInit, OnDestroy {
     public contentWidth = '384px';
     public imageUrls = ['assets/images/card/media/the_red_ice_forest.jpg',
         'assets/images/card/media/yosemite.jpg'];
-    public onNetworkStateChange = new Subject();
+    public onNetworkStateChange = new Subject<void>();
 
     private _wifiState = false;
     public get wifiState(): boolean {

src/app/notifications/banner/banner-styling/banner-styling.component.ts

@@ -20,7 +20,7 @@ export class BannerStylingComponent implements OnInit, OnDestroy {
         closeAnimation: slideOutRight,
         openAnimation: slideInLeft
     };
-    public onNetworkStateChange = new Subject();
+    public onNetworkStateChange = new Subject<void>();
     private _wifiState = false;
 
     public get wifiState(): boolean {

src/app/tree-grid/tgrid-keyboard-guide/tgrid-keyboardnav-guide.component.ts

@@ -198,7 +198,7 @@ export class TGridKeyboardnavGuide implements OnInit, OnDestroy {
                     'SUMMARY COMBINATIONS' : '';
     }
 
-    private _destroyer = new Subject();
+    private _destroyer = new Subject<void>();
     private _keyboardHandler = new KeyboardHandler([], GridSection.THEAD);
 
     public constructor(private cdr: ChangeDetectorRef, private _overlay: IgxOverlayService) { }

src/app/tree-grid/tree-grid-remote-filtering-sample/tree-grid-remote-filtering-sample.component.ts

@@ -17,7 +17,7 @@ export class TreeGridRemoteFilteringSampleComponent implements OnInit, AfterView
     public remoteData: Observable<any[]>;
     public noopFilterStrategy = NoopFilteringStrategy.instance();
 
-    private destroy$ = new Subject<boolean>();
+    private destroy$ = new Subject<void>();
 
     constructor(private _remoteService: RemoteFilteringService, private _cdr: ChangeDetectorRef) {
     }