get_clients for 0.10 get_active_clients for 0.9.x

lua/navigator/reference.lua

@@ -226,6 +226,9 @@ end
 -- a function from smjonas/inc-rename.nvim
 -- https://github.com/smjonas/inc-rename.nvim/blob/main/lua/inc_rename/init.lua
 local function fetch_lsp_references(bufnr, params, callback)
+  if not vim.lsp.get_clients then
+    vim.lsp.get_clients = vim.lsp.get_active_clients
+  end
   local clients = vim.lsp.get_clients({
     bufnr = bufnr,
   })