Coc.nvim: Normalize bindings for next and previous

[cprn]

Is your feature request related to a problem? Please describe.
Usual VIM bindings for next and previous are <c-n> and <c-p>. CoC seems to sometimes use those and sometimes it uses <c-j> and <c-k>, e.g.:

• calling <Plug>(coc-references) opens buffer that uses ctrl + n/p
• calling :CocList diagnostics opens buffer that uses ctrl + j/k

It seems to be related to fuzzy search.

Describe the solution you'd like
I'd prefer all lists to use the same bindings for next and previous: <c-n> and <c-p>.

Describe alternatives you've considered
I did try to learn when to use which set of bindings but my fingers are way too stubborn.

[chemzqm]

Please use list.nextKeymap and list.previousKeymap configuration.