patch 8.2.4861: it is not easy to restore saved mappings

Problem:    It is not easy to restore saved mappings.
Solution:   Make mapset() accept a dict argument. (Ernie Rael, closes #10295)
diff --git a/src/version.c b/src/version.c
index c3ecb62..51db458 100644
--- a/src/version.c
+++ b/src/version.c
@@ -747,6 +747,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4861,
+/**/
     4860,
 /**/
     4859,