google-ads-php-v2.0.0

Google Ads API Client Library for PHP v2.0.0

• Added support for v2 of Google Ads API.
• Renamed the getter and setter functions for unwrapped values from getXXXValue/setXXXValue to
  getXXXUnwrapped/setXXXUnwrapped to prevent them from clashing with other field names.
• Added a test to instantiate all classes in the codebase to make sure there are no syntax errors.
• Upgraded dependencies.