Error when compiling: Property 'contentRect' must be of type 'DOMRectReadOnly'

```
Compiling TypeScript sources through NGC
ERROR: node_modules/resize-observer-polyfill/src/index.d.ts:19:18 - error TS2717: Subsequent property declarations must have the same type.  Property 'contentRect' must be of type 'DOMRectReadOnly', but here has type 'DOMRectReadOnly'.

19         readonly contentRect: DOMRectReadOnly;
                    ~~~~~~~~~~~
```