patch 8.1.0185: running tests writes lua.vim even though it is not used

Problem:    Running tests writes lua.vim even though it is not used.
Solution:   Stop writing lua.vim.
diff --git a/src/version.c b/src/version.c
index a1535f6..f638db6 100644
--- a/src/version.c
+++ b/src/version.c
@@ -790,6 +790,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    185,
+/**/
     184,
 /**/
     183,