patch 8.2.3820: "vrc" does not replace composing characters

Problem:    "vrc" does not replace composing characters, while "rc" does.
Solution:   Check the byte length including composing characters.
            (closes #9351)
diff --git a/src/version.c b/src/version.c
index f29571e..cde6b4d 100644
--- a/src/version.c
+++ b/src/version.c
@@ -750,6 +750,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    3820,
+/**/
     3819,
 /**/
     3818,