• Move vector fields back into constraints because this is the exclusive place where they are used
• Read ode_order off the vector field callables with inspect to reduce the error proneness of a user remembering to pass ode_order=2 for higher-order ODEs. The ODE order is always uniquely determined from the vector field.
• Remove damping-increases with update-skipping (internal)
• Improve documentation (minor tweaks)

Technically, moving the vector field argument is not breaking because the previous release had the vector fields in the corrections already and we're just moving them back. However, since ode_order is gone, the change is not backwards compatible.