Added International Geocode support

Merge pull request #2 from Muffinman/feature/geocoding

Adding UK Specific Geocoding APIs

Merge pull request #1 from Muffinman/feature/geocoding

Added Directions and Distance Geocoding APIs

Added GeoFence to Address Verification Find.

Run "php-cs-fixer".

Added Bank Account Verification API.

Fixed trailing slash in Retrieve::getUri().

Updated Retrieve class.

Added support guzzlehttp/guzzle ^6.5 dependency.