2.13.3

A bit of dependency cleanup, and updated the list of crates that need to be pinned to build with MSRV.

Fixed

• Removed the once_cell dependency by making use of the new std::sync::OnceLock type. This change only affects the rustls-based https features. Thanks for the PR, @LyonSyonII! (#115)
• MSRV builds that got broken due to a rustix update. Now tempfile is pinned as well.