patch 8.1.1931: syntax test fails

Problem:    Syntax test fails.
Solution:   Add new javascriptreact type to completions.
diff --git a/src/testdir/test_syntax.vim b/src/testdir/test_syntax.vim
index 199a134..0479901 100644
--- a/src/testdir/test_syntax.vim
+++ b/src/testdir/test_syntax.vim
@@ -393,7 +393,7 @@
 
 func Test_ownsyntax_completion()
   call feedkeys(":ownsyntax java\<C-A>\<C-B>\"\<CR>", 'tx')
-  call assert_equal('"ownsyntax java javacc javascript', @:)
+  call assert_equal('"ownsyntax java javacc javascript javascriptreact', @:)
 endfunc
 
 func Test_highlight_invalid_arg()