test: fix openapi

public/openapi/write/posts/pid/diffs.yaml

@@ -37,6 +37,8 @@ get:
                           type: string
                         username:
                           type: string
+                        uid:
+                          type: string
                   editable:
                     type: boolean
                   deletable:

src/api/posts.js

@@ -517,6 +517,7 @@ postsAPI.getDiffs = async (caller, data) => {
 		revisions: timestamps.map((timestamp, idx) => ({
 			timestamp: timestamp,
 			username: usernames[idx],
+			uid: uids[idx],
 		})),
 		// Only admins, global mods and moderator of that cid can delete a diff
 		deletable: isAdmin || isModerator,