Incorrect return type getList() in CustomerRepository

[springimport]

Preconditions

Magento 2.2.3.
Get customers using CustomerRepository.

Steps to reproduce

1. CustomerRepository->getList().

Expected result

1. $searchCriteria is \Magento\Customer\Api\Data\CustomerSearchResultsInterface.

Actual result

1. $searchCriteria is \Magento\Framework\Api\SearchResults.

---

Example for OrderRepository (behavior is correct).
OrderRepository->getList() returns \Magento\Sales\Model\ResourceModel\Order\Collection.
Collection implements OrderSearchResultInterface.

@springimport, thank you for your report.
We've acknowledged the issue and added to our backlog.

[p-bystritsky]

Created PRs for 2.2 and 2.3.