Add opencolorio PyPI project to ASWF org

ASWF now has its own PyPI org, ASWF projects are encouraged to join the project to the org to ensure continuity in case current project owners become unavailable.

Process is to invite someone from the LF Release Engineering team to become a project owner, they will then be able to add the project to the ASWF PyPI org.

You can DM me on Slack for the account to send the invite to.