Bodies with files turns gets turned into string on server

[hazelnutcloud]

The issue can be specifically traced down to this line:

eden/src/treaty2/index.ts

Line 292 in 8a0f7b6

formData.append(key, field as any)

When passing in a value that is of type File[], calling .append() on it converts it into [object Blob] instead of the desired effect of appending the contents of the array.

This can be fixed by checking Array.isArray on the field.