Deoplete.nvim: [Request] Support for pum for command line in NeoVim

[ratheesh]

patch for pum support in wildoptions is merged into neovim master branch yesterday by @bfredl.
It will be nice if deoplete support is extended to command mode.

[Shougo]

Hm... It is possible?
I will test it later.

[Shougo]

Hm... I think more options are needed to support.

completeopt: noinsert, noselect feature is needed for command line.

[Shougo]

And get current command line completion mode API is needed.
Because, if the completion mode is empty, it should be disabled.

[Shougo]

https://github.com/Shougo/deoplete.nvim/pull/952

I have created the PR for it.

[Shougo]

feedkeys() does not call cmdline popup menu.
I don't know why.

[Shougo]

Please use wilder instead.
https://github.com/gelguy/wilder.nvim