chore(*): Update tests and API use for latest version.

Author: skrustev

projects/igniteui-angular/src/lib/core/i18n/resources.spec.ts

@@ -1,14 +1,24 @@
-import { getCurrentResourceStrings, getI18nManager, registerI18n, setCurrentI18n } from 'igniteui-i18n-core';
+import { getCurrentResourceStrings, getI18nManager, IResourceStrings, registerI18n, setCurrentI18n } from 'igniteui-i18n-core';
 import { ActionStripResourceStringsEN } from './action-strip-resources';
 import { BannerResourceStringsEN } from './banner-resources';
 import { changei18n, getCurrentResourceStrings as igxGetCurrentResourceStrings } from './resources';
 import { ActionStripResourceStringsBG } from 'projects/igniteui-angular-i18n/src/i18n/BG/action-strip-resources';
 import { BannerResourceStringsBG, ResourceStringsBG } from 'igniteui-i18n-resources';
+import { IResourceCategories } from 'node_modules/igniteui-i18n-core/i18n-manager.interfaces';
 
 describe('i18n', () => {
     beforeEach(() => {
         // Clear manager state between tests.
-        getI18nManager()['_resourcesMap'] = new Map([[getI18nManager().currentLocale, {}]]);
+        (getI18nManager() as any)._resourcesMap = new Map<string, IResourceCategories>([
+            [
+                'en',
+                {
+                    default: 'US',
+                    scripts: new Map<string, IResourceStrings>(),
+                    regions: new Map<string, IResourceStrings>([['US', {}]]),
+                },
+            ],
+        ]);
     });
 
     describe('old public API', () => {

projects/igniteui-angular/src/lib/core/utils.ts

@@ -723,7 +723,7 @@ export function formatDate(value: Date | string | number | null | undefined, for
         } else if (format?.includes('Time')) {
             timeStyle = format.replace('Time', '');
         } else if (format) {
-            return getDateFormatter().formatDateCustomFormat(value, locale, format, false, timezone);
+            return getDateFormatter().formatDateCustomFormat(value, format, { locale, timezone });
         }
         const options: Intl.DateTimeFormatOptions = {
             dateStyle,

src/app/grid-localization/grid-localization.sample.ts

@@ -141,6 +141,6 @@ export class GridLocalizationSampleComponent implements OnInit {
 
     public onButtonClick() {
         console.log("Old: " + formatDate(new Date("10/10/1993"), this.inputValue, this.locale));
-        console.log("New: " + getDateFormatter().formatDateCustomFormat(new Date("10/10/1993"), this.locale, this.inputValue));
+        console.log("New: " + getDateFormatter().formatDateCustomFormat(new Date("10/10/1993"), this.inputValue, { locale:  this.locale }));
     }
 }