patch 8.2.4837: modifiers not simplified when timed out

Problem:    Modifiers not simplified when timed out or using feedkeys() with
            'n" flag.
Solution:   Adjust how mapped flag and timeout are used. (closes #10305)
diff --git a/src/version.c b/src/version.c
index 53afc37..2fa8992 100644
--- a/src/version.c
+++ b/src/version.c
@@ -747,6 +747,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4837,
+/**/
     4836,
 /**/
     4835,