Modify `Optim.Options`

[thchr]

I had hoped to be able to change an individual option in Optim.Option, inheriting all other options, but could not find a way. Is it already implemented?

I.e., something like

o = Optim.Options(; f_abstol = 1e-4, g_abstol=1e-3)
modified_o = Optim.Options(o; show_trace = true) # now with f_abstol = 1e-4, g_abstol=1e-3, show_trace = true

[pkofod]

It is not possible, but may be a good idea to implement. Would you be up for giving it a go?

[thchr]

Sure; PR'd in #1172.