Nine different URL-specified Python dependencies had accumulated in edx-platform, noticably increasing the amount time it took to install edx-platform requirements. After many developer hours of work, we are nearly finished converting them to PyPI-hosted depencencies: openedx/wg-developer-experience#153 We're making these updates in hopes that we don't end up with so many URL-specified depencencies again. We're also updating OEP-18: https://github.com/openedx/open-edx-proposals/pull/450 The CODEOWNERS update would mean that Arbi-BOM is notified on all future PRs that change github.in. At the moment, edx-platform does not *require* CODEOWNER review, so this is not a *hard* gate to github.in changes.