MultipartReader.readForm().entries() does not contain all values for same name

[jd1378]

I was writing a test for one of my modules when I got into this issue.
If data is an array (appending to form data with same name multiple times), I cannot retrieve all values for the same name.
I have made a repo for reproducing this issue.
I also made an extra test (go_test.ts) for doing the same test with a simple go multipart echo server to make sure that the fetch is sending the data (it does).

still, I'm not sure if I'm doing it wrong or it is really a bug.

[jd1378]

I'll make a pr very soon (today)