Update migrations.py

migrations.py

@@ -59,7 +59,7 @@ async def m001_initial(db):
 async def m002_add_features(db):
     await db.execute(
         """
-        ALTER TABLE boltcards.cards ADD expiration_date DATE NULL;
+        ALTER TABLE boltcards.cards ADD expiration_date TEXT NULL;
     """
     )
 
@@ -82,4 +82,4 @@ async def m005_add_features(db):
         """
         ALTER TABLE boltcards.cards ADD limit_type TEXT NOT NULL DEFAULT 'sats';
     """
-    )
+    )