vim-patch:8.1.1120: cannot easily get directory entry matches #12222

Problem:    Cannot easily get directory entry matches.
Solution:   Add the readdir() function. (Yasuhiro Matsumoto, closes vim/vim#2439)
543c9b1921

closes #12212

src/nvim/eval.lua

@@ -255,6 +255,7 @@ return {
     pyeval={args=1},
     pyxeval={args=1},
     range={args={1, 3}},
+    readdir={args={1, 2}},
     readfile={args={1, 3}},
     reg_executing={},
     reg_recording={},