[flow] Enable namespace support in try-flow

Summary: Changelog: [internal]

Reviewed By: gkz

Differential Revision: D54967122

fbshipit-source-id: 1e1dd8c1de0dd05d414cd3517d3bfee6e81c2827

src/flow_dot_js.ml

@@ -139,7 +139,7 @@ let stub_metadata ~root ~checked =
     max_trace_depth = 0;
     max_workers = 0;
     missing_module_generators = [];
-    namespaces = false;
+    namespaces = true;
     react_runtime = Options.ReactRuntimeAutomatic;
     recursion_limit = 10000;
     relay_integration_esmodules = false;