bb8 0.9.0 (and bb8-postgres 0.9.0, bb8-redis 0.18.0) adopts RPITIT (first stabilized in Rust 1.75) to drop the dependency on async_trait
. This comes at the cost of raising the MSRV for these new releases to 1.75. If any bugs are found, I will consider releasing 0.8.x upgrades until such time as Tokio bumps its MSRV to 1.75.