patch 8.1.0386: cannot test with non-default option value

Problem:    Cannot test with non-default option value.
Solution:   Add test_option_not_set().
diff --git a/src/version.c b/src/version.c
index aa6d099..81fc685 100644
--- a/src/version.c
+++ b/src/version.c
@@ -795,6 +795,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    386,
+/**/
     385,
 /**/
     384,