Remove default properties from the filter and sorting decorators.

[Adrinalin4ik]

This doesn't change API.

• This change is for a better development experience. Default arguments with name field were removed from the schema. Now, in order to determine the index of filter or sorting argument uses metadata.
• This change is fixing hasura's remote schema permissions as before it didn't pass validation because of default values with name.
• Also this change removes unnecessary checks in the resolver. Before, in order to use order_by you have to check if argument is provided. Now you don't need to do that.

Before it was

  @Query(() => [UserObjectType])
  @GraphqlFilter()
  @GraphqlSorting()
  users(
    @Filter(() => [UserObjectType, UserFilterInputType], {sqlAlias: 'u'}) filter: Brackets,
    @Sorting(() => [UserObjectType, UserSortingInputType], { sqlAlias: 'u' }) sorting: SortArgs<UserObjectType>
  ) {
    const qb = this.userRepository.createQueryBuilder('u')
      .leftJoin('task', 't', 't.assignee_id = u.id')
      .where(filter);

      if (sorting) { // you have to check if the argument was passed
        qb.orderBy(sorting)
      }

    return qb.getMany()
  }

After

  @Query(() => [UserObjectType])
  @GraphqlFilter()
  @GraphqlSorting()
  users(
    @Filter(() => [UserObjectType, UserFilterInputType], {sqlAlias: 'u'}) filter: Brackets,
    @Sorting(() => [UserObjectType, UserSortingInputType], { sqlAlias: 'u' }) sorting: SortArgs<UserObjectType>
  ) {
    const qb = this.userRepository.createQueryBuilder('u')
      .leftJoin('task', 't', 't.assignee_id = u.id')
      .where(filter)
      .orderBy(sorting)

    return qb.getMany()
  }