Update required for Polygon POS network token migration from MATIC to POL
**Describe the bug**
Polygon has recently migrated its native token from MATIC to POL, but Bitcart has not yet integrated this change. This could potentially impact users transacting on the Polygon network. Please update Bitcart to support the new native token.

the problem occurs when you try to make a payment using bitcart on matic, bitcart never registers that the POL payment happened because it's still listening to MATIC
For more details, you can refer to the official announcement here:
[Polygon MATIC to POL Migration Announcement](https://polygon.technology/blog/matic-to-pol-migration-is-now-live-everything-you-need-to-know)

**To Reproduce**
Steps to reproduce the behavior:

1. Go to the admin panel of bitcart and navigate to the wallets section
2. open the wallet creation dialog and type anything in the name, set the currency to matic and set the address to anything
3. create the wallet 
4. you'll see that the wallet is indeed matic
5. Try to make an invoice with the registered wallet and pay it
6. bitcart never reads the transaction and times out
