fix IpInfoDb provider tests
fix MapQuest provider tests
fix MaxMind provider tests
fix GeoPlugin provider tests
fix OpenCage provider tests
fix MaxMindBinary provider tests and doc
fix GeoIP2 and Geoip providers encoding

@see:
https://github.com/geocoder-php/Geocoder/blob/2.x/src%2FGeocoder%2FProvider%2FGeoIP2Provider.php#L65
@see:
https://github.com/geocoder-php/Geocoder/blob/2.x/src%2FGeocoder%2FProvider%2FGeoipProvider.php#L61
add cached reponse for GoogleMaps provider
fix Geonames provider tests
add cached responses for BingMaps provider
fix ArcGISOnline provider tests and add new cached responses
fix GeoIPs provider tests and add new cached responses
fix TomTom provider tests, doc, phpunit.dist and add new cached responses
Merge pull request #380 from toin0u/patch-provider-tests

Patch provider's tests