Updates for publishing

readme.md

@@ -53,7 +53,7 @@ let y0 = Vector2::new(0.0, PI/2.0);
 
 // Set up the problem (ODE, Integrator, Controller, and Callbacks)
 let ode = ODE::new(&derivative, 0.0, 6.3, y0, params);
-let dp45 = DormandPrince45::new(1e-12_f64, 1e-6_f64);
+let dp45 = DormandPrince45::new().a_tol(1e-12).r_tol(1e-6);
 let controller = PIController::default();
 
 let value_too_high = Callback {