C2-W2 Optimization_methods task update_parameters_with_adam needs updatation

[opticSquid]

The older function used to return 3 variables parameters,v,s like

return parameters,v,s

At the end of the function but for now the tests got updated and now it wants to get 5 variables returned to test the function. So the function here also needs to be updated to reflect that.

See the newer version of test it wants to unpack 5 values from the function in place of 3 as with the previous versions

This is the older code in this repo that returned 3 variables only. I have included the older version of test also here that wanted to unpack 3 variables.