Add migration script to add optional submitter_name column

database/migrations/3.sql

@@ -0,0 +1,15 @@
+/* ADD OPTIONAL SUBMITTER NAME COLUMN IN GAMES TABLE */
+
+BEGIN;
+
+ALTER TABLE scores.games ALTER COLUMN submitter_id DROP NOT NULL;
+
+ALTER TABLE scores.games
+ADD COLUMN submitter_name TEXT;
+
+
+UPDATE metadata
+SET value = '3'
+WHERE property = 'latest_migration';
+
+COMMIT;