build: enable downlevel iteration for ESM5 target

NoNameProvided · NoNameProvided · commit fc30d7923bce · 2022-12-03T12:36:18.000Z
diff --git a/tsconfig.prod.esm5.json b/tsconfig.prod.esm5.json
@@ -4,5 +4,6 @@
     "module": "ES2015",
     "target": "ES5",
     "outDir": "build/esm5",
+    "downlevelIteration": true,
   },
 }
