Remove use of test(get_version=True) for versioning

[taldcroft]

This passes unit tests. I confirmed that running on a pickle file from JAN2819 and generating a review report shows the expected version numbers.

Fixes #88.

I'm basing this on 4.1.x. Once reviewed and merged we can cherry-pick into master. Traditionally it goes the other way around, but getting this in 4.1.x first is probably the priority.

[jeanconn]

And since master and 4.1.x should be the same, we should be OK regardless.

[jeanconn]

Looks good and works for me.

[taldcroft]

For the record I just cherry-picked this into master:

$ get checkout master
$ git cherry-pick -m 1  68ac502
$ git diff master 4.1.x
  <no diff>
$ git push origin master

That generated 4dfc3e6.