Bumping rust-cpython to 0.3.0
This is cleaner, and it's quite possible we could get a minor performance boost.
This instance will be upgraded to Heptapod 0.31.0 (final) on 2022-05-24 at 14:00 UTC+2 (a few minutes of down time)
This is cleaner, and it's quite possible we could get a minor performance boost.