patch 8.1.0286: 'incsearch' does not apply to :smagic and :snomagic

Problem:    'incsearch' does not apply to :smagic and :snomagic.
Solution:   Add support. (Hirohito Higashi)
diff --git a/src/version.c b/src/version.c
index 876fcf3..23bcbf8 100644
--- a/src/version.c
+++ b/src/version.c
@@ -795,6 +795,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    286,
+/**/
     285,
 /**/
     284,