fix for size data is missing from output report #4

[pdurbin]

@sfisher hi! It was a pleasure speaking with you the other week. Thanks for opening #4 about size/volume being missing from the JSON report. As we discussed, even if DataCite doesn't accept the size yet, for Dataverse we plan to process the JSON files created by Counter Processor and save the metrics in our database (diagram below) so we're interested in support for size. The fix is simply uncommenting some code you already wrote. Thank you!

The issue we're using on our side is IQSS/dataverse#4821

[sfisher]

Thanks Phil and Matthew,

Looks good. I'm merging this in.

It looks like there are a couple of security vulnerabilities in python libraries, so I'll update these couple of libraries and create another release version soon, also.