jquery-param | equivalent function to jQuery.param | Plugin library

The jquery-param npm package has the functionality I need in my Angular9 project. I noticed it doesn't have typings for typescript so I also added @types/jquery-param as dependency. I've tried importing in different ways to no avail. I've also read various answers about DefinitelyTyped and typings but can't manage to find the solution. Made a StackBlitz with intended usage if someone is willing to take a look.

Update:
TL;DR: I managed to import and use it. Now the project compiles and works great, but the VSCode's checker marks an error in the import statement. After closing and reopening VSCode it no longer shows error in the import. It seems it only load changes to tsconfig.json on app start.

In StackBlitz works great with just the typings and importing with import param from 'jquery-param';.

Went ahead and installed both packages in my real project. Then had trouble importing as the compiler complained:

ERROR in src/app/shared/services/http.service.ts:4:24 - error TS2497: This module can only be referenced with ECMAScript imports/exports by turning on the 'allowSyntheticDefaultImports' flag and referencing its default export.

This is because of how the typings are exported, as @wtho mentioned and as stated by:

index.d.ts(8, 1): This module is declared with using 'export =', and can only be used with a default import when using the 'allowSyntheticDefaultImports' flag.

Tried importing with import * as params from 'jquery-params' and other ways using curly braces, didn't work.

So I added