sarslanoglu/turkish_cities

### Related github issue for this PR

Resolves #001 <!--fill issue number-->

### Checklist

* [ ] I have performed a self-review of my own code
* [ ] I added comments, particularly in hard-to-understand areas
* [ ] I have made corresponding changes to the documentation `README.md`
* [ ] I added tests that prove my fix is effective or that my feature works
* [ ] `bundle exec rake` passes locally
* [ ] `rubocop` gives no error locally
* [ ] My PR title includes "WIP" or is [draft PR](https://help.github.com/en/github/collaborating-with-issues-and-pull-requests/about-pull-requests#draft-pull-requests) if work is in progress

### Description

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### Type of change

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* Bug fix (non-breaking change which fixes an issue)
* New feature (non-breaking change which adds functionality)
* Breaking change (fix or feature that would cause existing functionality to not
work as expected)
* Documentation update

### Which tests are written for this PR? And what are the expected results for these tests?

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