## OrdinaryDiffEq v5.42.4 [Diff since v5.42.3](https://github.com/SciML/OrdinaryDiffEq.jl/compare/v5.42.3...v5.42.4) **Merged pull requests:** - Allocation fixes in Implicit Extrapolation Methods (#1246) (@utkarsh530) - Switch to DataStructures 0.18 (#1250) (@devmotion) - Allocation fixes in controllers for Hairer Wanner Methods (#1251) (@utkarsh530)