Update tests
Update tests

You had 7 calls to the same routine:

```
new Artesaos\ZipCode\ZipCode(new Illuminate\Cache\CacheManager(app()), $this->getGuzzleHttpClient())
```

What if you need to add another dependency in the constructor of your ZipCode? You would need then to edit 7 lines of the same code (don't repeat yourself) and add the new depedency.

This new way you just need to change one method when new dependencies are added.
vs0uz4/zipcode,MehmetNuri/zipcode