Trying to set falsy value leads to error

Hi!

When you try to set fields of @RequestScope object to falsy value throws "Uncaught TypeError: 'set' on proxy: trap returned falsish for property '<property_name>'"

I think that it's happening because of 
```
set(target: T, p: string | symbol, value: any, receiver: any): boolean {
  return (instanceResolver()[p] = value);
}
```
in dynamic.object.handler.factory.ts