fix: declare pull_request auto_merge properties as string|null (#829)

* fix: declare pull_request auto_merge properties as string|null

See: https://docs.github.com/en/webhooks-and-events/webhooks/webhook-events-and-payloads#pull_request


Co-authored-by: wolfy1339 <webmaster@wolfy1339.com>

payload-schemas/api.github.com/common/auto-merge.schema.json

@@ -4,18 +4,20 @@
   "type": "object",
   "required": ["enabled_by", "merge_method", "commit_title", "commit_message"],
   "properties": {
-    "enabled_by": { "$ref": "user.schema.json" },
+    "enabled_by": {
+      "oneOf": [{ "$ref": "user.schema.json" }, { "type": "null" }]
+    },
     "merge_method": {
       "type": "string",
       "enum": ["merge", "squash", "rebase"],
       "description": "The merge method to use."
     },
     "commit_title": {
-      "type": "string",
+      "type": ["string", "null"],
       "description": "Title for the merge commit message."
     },
     "commit_message": {
-      "type": "string",
+      "type": ["string", "null"],
       "description": "Commit message for the merge commit."
     }
   },

payload-types/schema.d.ts

@@ -3008,19 +3008,19 @@ export interface Link {
  * The status of auto merging a pull request.
  */
 export interface PullRequestAutoMerge {
-  enabled_by: User;
+  enabled_by: User | null;
   /**
    * The merge method to use.
    */
   merge_method: "merge" | "squash" | "rebase";
   /**
    * Title for the merge commit message.
    */
-  commit_title: string;
+  commit_title: string | null;
   /**
    * Commit message for the merge commit.
    */
-  commit_message: string;
+  commit_message: string | null;
 }
 export interface DeploymentReviewApprovedEvent {
   action: "approved";