v6.0.0-rc1

• PHP 7.3 is no longer supported
• Added a new EasyPostClient object which encapsulates the API key. All functions are called against this client allowing for thread-safety (eg: $client->shipment->create())
  • All instance methods and the ability to have objects update in-place has been removed due to this rearchitecture. When updating objects or performing actions on them (eg: creating a label/scanform), you will need to assign the return value to a variable and use that moving forward instead of relying on the object getting updated without capturing the new return value
  • ->save() instance methods are now update() static methods
  • Functions no longer accept an API key as an optional parameter
  • EasyPost objects no longer contain the logic associated with them; instead, we have Services for each EasyPost object. All the services are properties of an EasyPostClient. You can then call functions on a Service.
• All function and parameter names are now camelCase. Previously we used a mix of camel and snake cases
• Improves error exception handling (closes #7)
  • Introduced ~2 dozen new exception types that extend from either ApiException or EasyPostException
  • ApiExceptions will behave like the previous EasyPostException class did. They will include a message, errors, code, httpStatus and httpBody. This class extends the more generic EasyPostException which only contains a message, used for exceptions thrown directly from this library
  • The ecode property of an ApiException is now just code
• Functions that previously returned true now return void as there is no response body from the API (eg: fundWallet, deletePaymentMethod, updateEmail, createList)
• Adopts Guzzle as the HTTP client for this library. This should provide a much more consistent experience, better encoding, and faster request times in some cases
• The results of calling allApiKeys is no longer double wrapped with the mode of the API key (these are still accessible inside of each object)
• Requestor has moved to Http, constants from EasyPost now live in Constants, Error moved to Exception
• Occurances of smartrate are now smartRate and Smartrate are now SmartRate to match the documentation and API expectations
• Referral is now ReferralCustomer to better match documentation and API expectation
• validateWebhook, getLowestSmartRate, and receiveEvent are now under EasyPost\Util\Util as they do not make any API calls and do not need the associated client object
  • The receive function previously in the namespace of Event is now called receiveEvent since it has been relocated to the generic Util namespace
  • Internal, library only utilities have been moved to EasyPost\Util\InternalUtil
• The beta EndShipper class has been removed, please use the generally available EndShipper class
• Various properties and functions that were previously intended for private/protected use but were public have been corrected
• All phpdoc type hints, descriptions, return values, and throws references were corrected or updated
• All dependencies were bumped
• Various other bug fixes and improvements were made along with addressing deprecation warnings