Upgrade to github3.py direct usage.
Upgrade to github3.py direct usage.

Previously, we only read the first page (response) of admins without 2fa
enabled.  Now that we're also looking at all members, the results may
spread to multiple responses.

Github3.py module has support for just returning iterators, which avoids
all the hassles of page handling and response parsing and 'magic header'
request creation. \o/

mozilla/github-org-scripts,mozilla/github-org-scripts,fwenzel/github-org-scripts,fwenzel/github-org-scripts,mozilla/github-org-scripts,hwine/github-org-scripts,hwine/github-org-scripts