add version flag to be able get nicer info in nevim LspInfo

[justgook]

when you run :LspInfo the neovim client tries to get version of ols, and have no success.
and after some time LSP becomes unresponsive and requires restart.
it would be nice add just one of those flags, that just returns current version of ols, so neovim lsp client can ping it time to time and check it health.

LSP configs active in this buffer (bufnr: 30) ~
- Language client log: ~/.local/state/nvim/lsp.log
- Detected filetype: `odin`
- 1 client(s) attached to this buffer
- Client: `ols` (id: 4, bufnr: [1, 28, 36, 30, 12])
  root directory:    ~//Projects/odin-game/
  filetypes:         odin
  cmd:               ~/.local/share/nvim/mason/bin/ols
  version:           `?` (Failed to get version) Tried:
  `~/.local/share/nvim/mason/bin/ols --version`
  `~/.local/share/nvim/mason/bin/ols -version`
  `~/.local/share/nvim/mason/bin/ols version`
  `~/.local/share/nvim/mason/bin/ols --help`