fix: handling codeaction items on latest neovim nightly (#27)

In the neovim/neovim@9281edb
'codeaction' items type has changed to
`{action: lsp.Command|lsp.CodeAction, ctx: lsp.HandlerContext}[]`
instead of just table of 2 elements `{ client_id, action }`.
So, because of that, plugin crashes with 'attempt to index a nil value'.

To be compatible with < 0.9 version, `if vim.version` was added.

lua/telescope/_extensions/ui-select.lua

@@ -28,11 +28,21 @@ return require("telescope").register_extension {
               client_name = 0,
             }
             for idx, item in ipairs(items) do
-              local client = vim.lsp.get_client_by_id(item[1])
+              local client_id, title
+              if vim.version and vim.version.cmp(vim.version(), vim.version.parse "0.10-dev") >= 0 then
+                client_id = item.ctx.client_id
+                title = item.action.title
+              else
+                client_id = item[1]
+                title = item[2].title
+              end
+
+              local client = vim.lsp.get_client_by_id(client_id)
+
               local entry = {
                 idx = idx,
                 ["add"] = {
-                  command_title = item[2].title:gsub("\r\n", "\\r\\n"):gsub("\n", "\\n"),
+                  command_title = title:gsub("\r\n", "\\r\\n"):gsub("\n", "\\n"),
                   client_name = client and client.name or "",
                 },
                 text = item,