MOBILE-3947 chore: Deprecation fixes

src/core/features/editor/components/rich-text-editor/rich-text-editor.ts

@@ -174,6 +174,7 @@ export class CoreEditorRichTextEditorComponent implements OnInit, AfterViewInit,
         this.lastDraft = this.control?.value;
 
         // Use paragraph on enter.
+        // eslint-disable-next-line deprecation/deprecation
         document.execCommand('DefaultParagraphSeparator', false, 'p');
 
         this.maximizeEditorSize();
@@ -632,6 +633,7 @@ export class CoreEditorRichTextEditorComponent implements OnInit, AfterViewInit,
      */
     protected executeCommand({ name: command, parameters }: EditorCommand): void {
         if (parameters == 'block') {
+            // eslint-disable-next-line deprecation/deprecation
             document.execCommand('formatBlock', false, '<' + command + '>');
 
             return;
@@ -641,6 +643,7 @@ export class CoreEditorRichTextEditorComponent implements OnInit, AfterViewInit,
             this.toolbarStyles[parameters] = this.toolbarStyles[parameters] == 'true' ? 'false' : 'true';
         }
 
+        // eslint-disable-next-line deprecation/deprecation
         document.execCommand(command, false);
 
         // Modern browsers are using non a11y tags, so replace them.
@@ -1043,6 +1046,7 @@ export class CoreEditorRichTextEditorComponent implements OnInit, AfterViewInit,
 
         if (text) {
             this.editorElement?.focus(); // Make sure the editor is focused.
+            // eslint-disable-next-line deprecation/deprecation
             document.execCommand('insertText', false, text);
         }
     }

src/core/services/lang.ts

@@ -349,12 +349,15 @@ export class CoreLangProvider {
     getTranslationTable(lang: string): Promise<Record<string, unknown>> {
         // Create a promise to convert the observable into a promise.
         return new Promise((resolve, reject): void => {
-            const observer = Translate.getTranslation(lang).subscribe((table) => {
+            const observer = Translate.getTranslation(lang).subscribe({
+                next: (table) => {
                     resolve(table);
                     observer.unsubscribe();
-            }, (err) => {
+                },
+                error: (err) => {
                     reject(err);
                     observer.unsubscribe();
+                },
             });
         });
     }

src/core/services/utils/utils.ts

@@ -376,7 +376,7 @@ export class CoreUtilsProvider {
             virtualInput.innerHTML = text;
             virtualInput.select();
             virtualInput.setSelectionRange(0, 99999);
-            document.execCommand('copy');
+            document.execCommand('copy'); // eslint-disable-line deprecation/deprecation
         }
 
         // Show toast using ionicLoading.