Undici does not work with Nodejs 12 and below

[bugb]

Bug Description

Since the PR, the library will not work with Nodej12 and below due to optional chainning:

https://github.com/nodejs/undici/pull/2402/files#diff-d3320266ee631518dc58b9cb1a3a3bc81526746db0603fb8bc32a535cc90d7a4R183

Reproducible By

• Step 1: Make sure that you are using Nodejs 12 or below.
• Step 2: Using undici in any Nodejs project.

Expected Behavior

This should be compatible with Nodejs 12 or below

Logs & Screenshots

When using undici latest version we can get the following error:

Environment

Nodejs 12.22.12 and below

Additional context

I have created a PR here: #2470
Please help me to review it!

Thanks!

[ronag]

We don't support EOL versions of node.