Update index.ts to fix set not updating the value properly

The set will now properly update the key in the database by removing the old value from the key if the key already exists in the database.

scripts/jaylydb/index.ts

@@ -231,6 +231,8 @@ class JaylyDB implements Map<string, string | number | boolean> {
     if (encoded.length > 32767) throw new RangeError("JaylyDB::set only accepts a string value less than 32767 characters.");
 
     // push change to disk
+    const participant = this.localState.get(key);
+    if (participant) this.objective.removeParticipant(participant.identity);
     this.objective.setScore(encoded, 0);
     const data = {
       encoded_value: encoded,