bug: Cannot find module 'node-fetch' from '../node_modules/@cowprotocol/contracts/lib/commonjs/api.js'

[mmv08]

when you import something from the root of the SDK, e.g.,

import { EnrichedOrder, OrderBookApi } from '@cowprotocol/cow-sdk'

it fails with:

 Cannot find module 'node-fetch' from '../node_modules/@cowprotocol/contracts/lib/commonjs/api.js'

    Require stack:
      /home/mmv/Projects/Safe/safenet/processor-service/node_modules/@cowprotocol/contracts/lib/commonjs/api.js
      /home/mmv/Projects/Safe/safenet/processor-service/node_modules/@cowprotocol/contracts/lib/commonjs/index.js
      /home/mmv/Projects/Safe/safenet/processor-service/node_modules/@cowprotocol/cow-sdk/dist/index.js
      /home/mmv/Projects/Safe/safenet/processor-service/src/modules/transaction/transaction.multisigtx.parser.ts
      /home/mmv/Projects/Safe/safenet/processor-service/src/modules/transaction/transaction.scheduler.ts
      /home/mmv/Projects/Safe/safenet/processor-service/src/modules/transaction/transaction.module.ts
      /home/mmv/Projects/Safe/safenet/processor-service/src/app.module.ts
      safenet.e2e-spec.ts

I took a brief look and it seems the reason for this is that the package.json for @cowprotocol/contracts@1.6.0 does not install node-fetch package used in the API file in the same package