change emoji to use bigint

src/db/schema/v7.ts

@@ -29,8 +29,8 @@ export class Schema implements IDbSchema {
                 name TEXT NOT NULL,
                 animated INTEGER NOT NULL,
                 mxc_url TEXT NOT NULL,
-                created_at INTEGER NOT NULL,
-                updated_at INTEGER NOT NULL,
+                created_at BIGINT NOT NULL,
+                updated_at BIGINT NOT NULL,
                 PRIMARY KEY(emoji_id)
         );`, "emoji");