nvim: modernize outdated functions

config/nvim/lua/config/plugins/plantuml-previewer.lua

@@ -17,7 +17,7 @@ return {
     local cmdline = [[which plantuml | xargs cat | grep plantuml.jar]]
     local regex = [[\v\s['"]?(\S+/plantuml\.jar)]]
     local jar = vim.fn.matchlist(vim.fn.system(cmdline), regex)[2]
-    if jar and vim.loop.fs_stat(jar) then
+    if jar and vim.uv.fs_stat(jar) then
       vim.g["plantuml_previewer#plantuml_jar_path"] = jar
     end
   end,

config/nvim/lua/util/lua.lua

@@ -28,8 +28,7 @@ end
 M.execute_lines = function(first, last)
   first = first or vim.fn.line(".")
   last = last or first
-  ---@diagnostic disable-next-line: param-type-mismatch
-  local code = vim.fn.join(vim.fn.getline(first, last), "\n")
+  local code = vim.iter(vim.fn.getline(first, last)):join("\n")
   loadstring(code)()
 end