Notification examples do not adhere to defined schema

[LucasRxTx]

Describe the bug
There are several notification examples that do not adhere to their defined schema.

For example: REPORT_AVAILABLE example notification does not comply with the declared schema for a ReportAvailableNotificationRequestItem. paymentMethod is stated to be required but the example is missing it. It is unclear what schema I should expect the NotificationRequestItem to be.

There are other errors in the schema definitions, for example for success values, though i have reported it as a separate issue: #26

To Reproduce
Look at the openAPI specification for a ReportAvailableNotificationRequestItem and see that paymentMethod is required.
Look at the openAPI specification example response for REPORT_AVAILABLE and see the paymentMethod is not included in the example.

Expected behavior
Both the actual notification, and the example notification should adhere to the declared schema for REPORT_AVAILABLE.

Screenshots
None

Desktop (please complete the following information):
irrelevant

Smartphone (please complete the following information):
irrelevant

Additional context
Using your example responses to create a mock server causes errors in our test system. We are now unsure of the actual expected schema for notifications.

[LucasRxTx]

This seems to be the case in other notifications as well

for example:

• adyen-openapi/yaml/Webhooks-v1.yaml

  Line 1574 in 4d59745

  post-AUTORESCUE-autorescue:

• adyen-openapi/yaml/Webhooks-v1.yaml

  Line 1613 in 4d59745

  post-CANCEL_AUTORESCUE-cancel_autorescue:

• adyen-openapi/yaml/Webhooks-v1.yaml

  Line 1858 in 4d59745

  post-ORDER_CLOSED-order_closed:

• adyen-openapi/yaml/Webhooks-v1.yaml

  Line 1879 in 4d59745

  post-ORDER_OPENED-order_opened:

• adyen-openapi/yaml/Webhooks-v1.yaml

  Line 1895 in 4d59745

  post-PAIDOUT_REVERSED-paidout_reversed:

[PPKFS]

Also encountering this. Plus, the boolean fields in the schema are listed as type: boolean but they are encoded as strings over the enum "true", "false".