Update WOFpy to latest commits, latest versions of dependencies

[aufdenkampe]

There are 48 commits on the develop branch since the last release (v2.3.0).

For upgrading to Python 3, see ODM2/WOFpy#231 and the discussion in PR ODM2/WOFpy#230 (which was never merged).

[aufdenkampe]

@emiliom, as we think about kicking off the next development round in early December, let's list out what dependencies might benefit from updating.