Fix for users using NodeNext TS Module

[simonmcallister0210]

Context

Users using the NodeNext in their tsconfig.json file noticed issues importing from the package. Errors like:

Module 'cognito-srp-helper' has no exported member 'createSrpSession'

Looking inside the dist/types folder they noticed this type error:

Relative import paths need explicit file extensions in ECMAScript imports when '--moduleResolution' is 'node16' or 'nodenext'. Consider adding an extension to the import path.

1 export * from "./cognito-srp-helper";

Using a single declaration file would fix this, because it removes the need for any import statements. For this fix we're tweaking the type build to output a single file index.d.ts

Changes

Tweak build:types script to output single declaration file index.d.ts

Testing

Before:

After: