Ability to enable just completion from LS

[edgard]

Is your feature request related to a problem? Please describe.

Add an option do disable every feature but code-completion from LS

Additional context

The idea is to use LanguageClient just as code-completion source, as many of us already use separate plugins for Linting/Checking/Indenting (like ALE) and just want something to CC.

[autozimu]

Did you try following option, https://github.com/autozimu/LanguageClient-neovim/blob/3e31d01da54aaad3905da813cf7d3564bc8d98d7/doc/LanguageClient.txt#L188-L194

As far as I can remember, diagnostics is the only feature would exhibit visual info to the user without explicit invocation.

[Shados]

@autozimu maybe they want a per-buffer disable? There are certainly filetypes where I would rather get diagnostics from ALE but still have completion/etc. from a language server.