patch 8.1.2184: option context is not copied when splitting a window

Problem:    Option context is not copied when splitting a window. (Daniel
            Hahler)
Solution:   Copy the option context, so that ":verbose set" works.
            (closes #5066)
diff --git a/src/version.c b/src/version.c
index 7d61a4f..447f761 100644
--- a/src/version.c
+++ b/src/version.c
@@ -742,6 +742,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2184,
+/**/
     2183,
 /**/
     2182,