Fix savePost() never resolving

src/lib/server/db.ts

@@ -196,7 +196,7 @@ export async function savePost(post: Post): Promise<undefined> {
   if (!databaseReady) {
     await waitReady();
   }
-  return new Promise((resolve, reject) => {
+  return await new Promise<undefined>((resolve, reject) => {
     console.debug(`Saving post ${post.url}`);
     const account = post.account;
     db.run(