refactor: remove dependence node-fetch

[CHC383]

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close https://github.com/OneSignal/onesignal-node-api/issues/83

Description

One Line Summary

Remove node-fetch as fetch is available in the modern environments (browser and Node >= 18)

Details

Motivation

This package depends on node-fetch v2.x, which is old and depends on an old version of whatwg-url and causes warning "The punycode module is deprecated. Please use a userland alternative instead." in Node >= 22. node-fetch is not needed in the modern environments, see https://github.com/lquixada/cross-fetch/issues/177#issuecomment-2358005899

Scope

The package will use the Node built-in fetch

Testing

Manual testing

• yarn prepare
• I am not sure how to do further testing but I am happy to do so if I could get some guidance.

Checklist

Overview

• [x] I have filled out all REQUIRED sections above
• [x] PR does one thing
  • If it is hard to explain how any codes changes are related to each other then it most likely needs to be more than one PR
• [x] Any Public API changes are explained in the PR details and conform to existing APIs

Testing

• [x] I have personally tested this on my device, or explained why that is not possible

Final pass

• [x] Code is as readable as possible.
  • Simplify with less code, followed by splitting up code into well named functions and variables, followed by adding comments to the code.
• [x] I have reviewed this PR myself, ensuring it meets each checklist item
  • WIP (Work In Progress) is ok, but explain what is still in progress and what you would like feedback on. Start the PR title with "WIP" to indicate this.