Issue title: No visibility data with buienradar weather
 Issue body: Hi,

I've got buienradar as source for the weather-card and everything is fine except for the visibility info.
I am using the buienradar platform withing HASS and not the sensors version.
![weerkaart](https://user-images.githubusercontent.com/36402924/80803056-719fed00-8bb1-11ea-9ade-6314f92887e8.png)

I tried using the sensors integration of buienradar but that didn't work.

Regards.
 Comments: 
 Comment 0: duplicate of #37 
{'source': 'GithubIssues', 'repo_name_with_owner': 'bramkragten/weather-card', 'issue_id': 610711714, 'repo_stars': 353.0}