chore: don't bundle undici

[benmccann]

undici is already provided by Node.js, so we don't need to bundle our own version of it. Use the node-native-fetch library, which takes care of this and has battle-tested proxy-handling code.

before:
2107kB dist/index.js
62484 lines

after:
1812kB dist/index.js
36063 lines

[peter-evans]

@benmccann Thank you! This is great.

I'm wondering if I still need const proxy = getProxyForUrl(options.baseUrl) for the custom proxy options. It looks like node-fetch-native supports parsing the proxy env vars. Perhaps I can get away with just using fetch instead of createFetch.

[peter-evans]

Confirmed this passes the test suite: #78 (comment)

[peter-evans]

Nice! 🙌

#3478

[peter-evans]

I'm wondering if I still need const proxy = getProxyForUrl(options.baseUrl) for the custom proxy options. It looks like node-fetch-native supports parsing the proxy env vars. Perhaps I can get away with just using fetch instead of createFetch.

Seem to work and pass my proxy tests: #3483