Update funfactory

This update picks up the following:

faca9a7 Merge pull request #49 from willkg/dev-languages-fix
6bd39f4 Fix DEV_LANGUAGES
2e845d5 Bump funfactory for PyPI
d772530 Flesh out classifiers  r=peterbe

Two of those are cosmetic and don't affect behavior at all. The
DEV_LANGUAGES fix will make contributors happier.

r?