Building error in Angular 19 projects

Hi,

When using the last version (2.19.6) with Angular 19 and the Vite bundler, I get this error:
```sh
✘ [ERROR] TS2309: An export assignment cannot be used in a module with other exported elements. [plugin angular-compiler]

    node_modules/proj4/dist/index.d.ts:5:0:
      5 │ export = proj4;
        ╵ ~~~~~~~~~~~~~~~
```
Can you fix it in a later version please?

Thanks a lot