Getting a typescript error since 2.16.7 (#522) when using node_modules/proj4/dist/proj4.js

/* global proj4 */
proj4.defs('EPSG:5514', '...');

Property 'defs' does not exist on type 'typeof import("/xxx/node_modules/proj4/dist/index")'.ts(2339)

Reverting to export = proj4; in the index.d.ts makes it work again, not sure how to square this with the angular error from #521 ...