[schemas] Bug - PlacesDetailsResponse

Thanks for stopping by to let us know something could be better!

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**PLEASE READ**

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Check for answers on StackOverflow with the [google-maps](http://stackoverflow.com/questions/tagged/google-maps) tag.

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Please be sure to include as much information as possible:

#### Environment details

1. Specify the API at the beginning of the title (for example, "Places: ...")
2. OS type and version
3. Library version and other environment information

#### Steps to reproduce

1. ?

#### Code example

```
# example
```

#### Stack trace
```
# example
```

Following these steps will guarantee the quickest resolution possible.

Thanks!