refactor: replace get_event_loop with asyncio.run for better async handling in example scripts

examples/transaction.py

@@ -1,15 +1,15 @@
-from asyncio import get_event_loop
-
+import asyncio
 from pyspapi import SPAPI
 
-spapi = SPAPI(card_id='CARD_ID', token='TOKEN')
+spapi = SPAPI(card_id="CARD_ID", token="TOKEN")
+
 
 
 async def main():
-    new_balance = await spapi.create_transaction(receiver='77552',
-                                                 amount=1,
-                                                 comment='test')
+    new_balance = await spapi.create_transaction(
+        receiver="20199", amount=1, comment="test"
+    )
     print(new_balance)
 
-loop = get_event_loop()
-loop.run_until_complete(main())
+
+asyncio.run(main())