Just adding for possible error search reference, if people happen to end up here with Could not find a declaration file for module 'postgres' errors when using TypeScript NodeNext module resolution.

Error with current 3.2.4 version, without this fix merged in is:

api/src/components/db.ts:3:22 - error TS7016: Could not find a declaration file for module 'postgres'. '/Users/x/y/z/node_modules/postgres/src/index.js' implicitly has an 'any' type.
  Try `npm i --save-dev @types/postgres` if it exists or add a new declaration (.d.ts) file containing `declare module 'postgres';`

  import postgres from 'postgres';
                       ~~~~~~~~~~

I guess declaring declare module 'postgres' yourselves could be a solution while waiting for release, but I settled for brtual edit of node_modules/postgres/package.json and added related exports.types entry by hand.
Not production grade fix, but works for me as I am only developing locally currently.