Error on missing commit author login

[dgw]

As an example, sopel-irc/sopel@30cddb2 yields the following error in the github plugin:

TypeError: 'NoneType' object is not subscriptable (file
"/usr/local/lib/python3.6/site-packages/sopel_modules/github/github.py",
line 209, in commit_info)

Assuming that instance is up to date, that line number points to

sopel-github/sopel_modules/github/github.py

Line 209 in 08a816a

data['author']['login'],

It makes sense, since that commit appears not to be associated with a GitHub user. I'd need to inspect the API response to be sure, but I'm reasonably confident that the issue is there.

[dgw]

Yep, the author object is null for that commit, I guess because the email address doesn't match any known GitHub user. Fix incoming.