bump forward compatibility level

fredemmott · fredemmott · commit 257fd8a81b86 · 2018-10-17T13:59:00.000-07:00
diff --git a/.hhconfig b/.hhconfig
@@ -5,4 +5,4 @@ disallow_non_arraykey_keys=true
 disallow_unsafe_comparisons=true
 decl_override_require_hint=true
 enable_experimental_tc_features=shape_field_check,sealed_classes
-forward_compatibility_level=3.28
+forward_compatibility_level=3.29
