[flow] Turn on enable_ts_utility_syntax in type_sig_options.ml

Summary: Changelog:[internal]

Reviewed By: gkz

Differential Revision: D88755857

fbshipit-source-id: 6a9228d70d7d9c2f55668898fe96cd9db6a390e0

Author: marcoww6

src/parser_utils/type_sig/type_sig_options.ml

@@ -81,7 +81,7 @@ let builtin_options options =
     enable_component_syntax = true;
     component_syntax_enabled_in_config = Options.component_syntax options;
     enable_ts_syntax = false;
-    enable_ts_utility_syntax = false;
+    enable_ts_utility_syntax = true;
     hook_compatibility = Options.hook_compatibility options;
     enable_records = Options.enable_records options;
     for_builtins = true;