fix: deprecation of url.parse

[Zamiell]

Fixes #34.

Problem

Node.js v24 introduced DEP0169, a deprecation warning for url.parse():

(node:1234) [DEP0169] DeprecationWarning: url.parse() behavior is not standardized
and prone to errors that have security implications. Use the WHATWG URL API instead.

This library called url.parse() in two places, causing the warning to be emitted to stderr whenever the library was used. Downstream projects that assert on clean stderr (e.g. in tests) were broken as a
result.

Solution

Try to detect if the WHATWG URL API exists, and if it does, replace both url.parse() calls with a polyfill using the new API.

(Claude helped me write this PR.)

[Zamiell]

@ljharb Sorry for the ping, but would you be able to take a look or direct me to the right person?

[ljharb]

Before I give it a thorough review, please fix the test failures on node < 10 :-)

[ljharb]

can we add a test that ensures no deprecation warning is fired?

[ljharb]

I've rebased and updated this; the tests now properly clean up the process warning listener.

[Zamiell]

lgtm