add support common options with moreOpts key

[aegeansea]

由于需要格式化返回错误信息，新增了通用配置项

如:

  config.graphql = {
    router: '/graphql',
    moreOpts: {
      formatError: error => ({
        message: 'interal error',
        locations: error.locations,
        path: error.path,
      }),
    },
  };