patch 8.1.1107: no test for 'visualbell'

Problem:    No test for 'visualbell'.
Solution:   Add a test.
diff --git a/src/testdir/test_options.vim b/src/testdir/test_options.vim
index 1bb0d3f..241c7b6 100644
--- a/src/testdir/test_options.vim
+++ b/src/testdir/test_options.vim
@@ -536,5 +536,10 @@
   call assert_inrange(30 * 0.01, 999.0, elapsed)
 
   bwipe!
-  delfunc ChangeText
+endfunc
+
+func Test_visualbell()
+  set visualbell
+  call assert_beeps('normal 0h')
+  set novisualbell
 endfunc
diff --git a/src/version.c b/src/version.c
index 9fd355a..e1809c6 100644
--- a/src/version.c
+++ b/src/version.c
@@ -772,6 +772,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1107,
+/**/
     1106,
 /**/
     1105,