feat: Add custom_property events (#3379)

Fixes: #3207.

Author: acouvreur

AUTHORS

@@ -40,6 +40,7 @@ Alex Su <alexsu@17.media>
 Alex Unger <zyxancf@gmail.com>
 Alexander Harkness <me@bearbin.net>
 Alexey Alekhin <laughedelic@gmail.com>
+Alexis Couvreur <alexiscouvreur.pro@gmail.com>
 Alexis Gauthiez <alexis.gauthiez@gmail.com>
 Ali Farooq <ali.farooq0@pm.me>
 Alin Balutoiu <alinbalutoiu@gmail.com>

github/event_types.go

@@ -132,6 +132,43 @@ type CreateEvent struct {
 Installation *Installation `json:"installation,omitempty"`
 }
 
+// CustomPropertyEvent represents a created, deleted or updated custom property.
+// The Webhook event name is "custom_property".
+//
+// Note: this is related to custom property configuration at the enterprise or organization level.
+// See CustomPropertyValuesEvent for activity related to custom property values for a repository.
+//
+// GitHub API docs: https://docs.github.com/en/webhooks/webhook-events-and-payloads#custom_property
+type CustomPropertyEvent struct {
+// Action possible values are: "created", "deleted", "updated".
+Action *string `json:"action,omitempty"`
+Definition *CustomProperty `json:"definition,omitempty"`
+
+// The following fields are only populated by Webhook events.
+Enterprise *Enterprise `json:"enterprise,omitempty"`
+Installation *Installation `json:"installation,omitempty"`
+Org *Organization `json:"organization,omitempty"`
+Sender *User `json:"sender,omitempty"`
+}
+
+// CustomPropertyValuesEvent represents an update to a custom property.
+// The Webhook event name is "custom_property_values".
+//
+// GitHub API docs: https://docs.github.com/en/webhooks/webhook-events-and-payloads#custom_property_values
+type CustomPropertyValuesEvent struct {
+// Action possible values are: "updated".
+Action *string `json:"action,omitempty"`
+NewPropertyValues []*CustomPropertyValue `json:"new_property_values,omitempty"`
+OldPropertyValues []*CustomPropertyValue `json:"old_property_values,omitempty"`
+
+// The following fields are only populated by Webhook events.
+Enterprise *Enterprise `json:"enterprise,omitempty"`
+Installation *Installation `json:"installation,omitempty"`
+Repo *Repository `json:"repository,omitempty"`
+Org *Organization `json:"organization,omitempty"`
+Sender *User `json:"sender,omitempty"`
+}
+
 // DeleteEvent represents a deleted branch or tag.
 // The Webhook event name is "delete".
 //