[Diff since v1.48.0](https://github.com/SciML/DiffEqFlux.jl/compare/v1.48.0...v1.49.0) **Closed issues:** - Fast vjp form (#681) **Merged pull requests:** - swapped sciml_train calls with Optimization.solve() (#711) (@Abhishek-1Bhatt) - CompatHelper: add new compat entry for Lux at version 0.4, (keep existing compat) (#716) (@github-actions[bot]) - Neural ODE tutorial (#718) (@Abhishek-1Bhatt)