chore: Enforce interfaces for object types (#2544)

src/patches/types.ts

@@ -1,3 +1,5 @@
 import { LitElement } from 'lit';
 
-export type ConstructableLitElement = { new (...args: unknown[]): LitElement };
+export interface ConstructableLitElement {
+  new (...args: unknown[]): LitElement;
+}