message: fixes add checkout session events
diff: @@ -51,6 +51,8 @@ pub enum EventType {
  ChargeDisputeUpdated,
  #[serde(rename = "charge.refund.updated")]
  ChargeRefundUpdated,
  + #[serde(rename = "checkout.session.completed")]
  + CheckoutSessionCompleted,
  #[serde(rename = "coupon.created")]
  CouponCreated,
  #[serde(rename = "coupon.deleted")]
  @@ -196,6 +198,8 @@ pub enum EventObject {
  BankAccount(BankAccount),
  Charge(Charge),
  Dispute(Dispute),
  + #[serde(rename = "checkout.session")]
  + CheckoutSession(CheckoutSession),
  File(File),
  Invoice(Invoice),
  #[serde(rename = "invoiceitem")]
  