patch 8.2.4213: too much code for supporting old MSVC versions

Problem:    Too much code for supporting old MSVC versions.
Solution:   Remove MSVC 2003 support. (Ken Takata, closes #9623)
diff --git a/src/version.c b/src/version.c
index fab7939..2846ea9 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4213,
+/**/
     4212,
 /**/
     4211,