fix: adds check for Reflect. Reflect.getOwnMetadataKeys

Author: ChristianKienle

Diff for: src/reflect.ts

@@ -18,7 +18,12 @@ export function copyReflectionMetadata (
   })
 }
 
+const reflectionMetadataKeysIsSupported = reflectionIsSupported && Reflect.getOwnMetadataKeys
+
 function forwardMetadata (to: object, from: object, propertyKey?: string): void {
+  if (!reflectionMetadataKeysIsSupported) {
+    return
+  }
   const metaKeys = propertyKey
     ? Reflect.getOwnMetadataKeys(from, propertyKey)
     : Reflect.getOwnMetadataKeys(from)