patch 8.2.4994: tests are using legacy functions

Problem:    Tests are using legacy functions.
Solution:   Convert a few tests to use :def functions.
diff --git a/src/version.c b/src/version.c
index e9934a0..6ea31dd 100644
--- a/src/version.c
+++ b/src/version.c
@@ -735,6 +735,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4994,
+/**/
     4993,
 /**/
     4992,