Apply corrections identified by SonarQube (#8457)

src/resizer/item.ts

@@ -30,7 +30,7 @@ export default class ResizeItem<C extends IConfig = IConfig> {
     ) {
         this.reverse = resizer.isReverseResizeHandle(handle);
         if (container) {
-            this.domNode = <HTMLElement>(container);
+            this.domNode = container;
         } else {
             this.domNode = <HTMLElement>(this.reverse ? handle.nextElementSibling : handle.previousElementSibling);
         }

src/resizer/resizer.ts

@@ -195,11 +195,11 @@ export default class Resizer<C extends IConfig = IConfig> {
         return { sizer, distributor };
     }
 
-    private getResizeHandles() {
+    private getResizeHandles(): HTMLElement[] {
         if (this?.config?.handler) {
             return [this.config.handler];
         }
         if (!this.container?.children) return [];
-        return Array.from(this.container.querySelectorAll(`.${this.classNames.handle}`)) as HTMLElement[];
+        return Array.from(this.container.querySelectorAll(`.${this.classNames.handle}`));
     }
 }