• Add Reason for 403 messages #451 by @barryvdh
• Create new classes with static instead of self #437 by @pstuifzand
• Added a helper method to get read access to the 'fillable' parameter #427 by @jeff-99
• GL Account Classification Mappings endpoint is no longer in beta #426 by @jeff-99
• Add subscription line type entity #441 by @vdhicts
• Updates to rate limits #454 by @MaartenWaegeman
• Add a callback to be able to catch refreshes from other threads #449 by @alexjeen