fix: move static function from ip to the parse-udp module

[fabianbormann]

What is the purpose of this pull request? (put an "X" next to item)

[ ] Documentation update
[ ] Bug fix
[ ] New feature
[X] Other, please explain:

For the past year, there has been a vulnerability in the less/not maintained node-ip package. While the vulnerability doesn't affect bittorrent-tracker directly, it still results in a 1 high severity vulnerability warning after running npm i on this project or any other project that has bittorrent-tracker as a dependency. This creates a negative impression from a customer perspective or during code audits.

What changes did you make? (Give an overview)

This repository only uses a single static function from the node-ip package, which is unmaintained but available under the MIT license. I copied this static function directly into the parse-udp module and removed the node-ip dependency entirely.

I ran the tests, which show:

1..557
# tests 557
# pass  557

# ok

Additionally, npm i now shows found 0 vulnerabilities after running the command.

[socket-security]

No dependency changes detected. Learn more about Socket for GitHub.

👍 No dependency changes detected in pull request

[fabianbormann]

@DiegoRBaquero, are you the right person to review this PR? If not, could you please involve someone else who could take a look at it? Thanks! 😊

[github-actions]

Is this still relevant? If so, what is blocking it? Is there anything you can do to help move it forward?

[fabianbormann]

Please re-open the PR

[subins2000]

This should be re-opened. It's a good change, I noticed the high severity warning as well