Previously, it would query the size from the wrong dict and obtain
the value 0 all the time. This would have made every upload fail with
`UploadSizeLimitExeeded`.
Now we obtain the actual size limit, and will ignore it if unset/0
for some reason.
Patch += 1
That way, crate names reveal exact inforamtion about the contained
API revision.
* crate version: code gen version
* +<revision> (build-metadata): exact version of API schema
Fixes#38
