fix: paramz version for parallel optimization fix
fix: paramz version for parallel optimization fix

esiivola/GPYgradients,mikecroucher/GPy,SheffieldML/GPy,befelix/GPy,SheffieldML/GPy,mikecroucher/GPy,befelix/GPy,mikecroucher/GPy,SheffieldML/GPy,befelix/GPy,esiivola/GPYgradients,mikecroucher/GPy,befelix/GPy,SheffieldML/GPy,esiivola/GPYgradients,ysekky/GPy,esiivola/GPYgradients,dhhjx880713/GPy,dhhjx880713/GPy,ysekky/GPy,ysekky/GPy,dhhjx880713/GPy,ysekky/GPy,dhhjx880713/GPy