v13.9.0

• #1629 Update generated code
  • Add support for new resource CustomerSession
  • Add support for create method on resource CustomerSession
  • Remove support for values obligation_inbound, obligation_payout_failure, obligation_payout, and obligation_reversal_outbound from enum BalanceTransaction.type
  • Add support for billing_cycle_anchor_config on Subscription

See the changelog for more details.