fix: use RequestInit from node-fetch instead of inbuilt typescript

[Zelnes]

Fix based on this stackoverflow answer https://stackoverflow.com/a/67870352/5868851

The issue was that the call sonarqube-sdk/src/base/config.base.ts:fetch(url, init) would'nt succeed even if the parameters are good (tested with curl and postman), which would result in an error.

The fix is to pass a RequestInit parameter for init, which make the call to fetch succeed.