add gas limits for some AVX20, tune for PLG20 and BEP20

[cipig]

the PLG20 and BEP20 tokens i tested now use

    "gas_limit": {
        "eth_send_erc20": 55000,
        "erc20_payment": 110000,
        "erc20_receiver_spend": 80000,
        "erc20_sender_refund": 80000
    }

the AVX20 tokens

    "gas_limit": {
        "eth_send_erc20": 60000,
        "erc20_payment": 120000,
        "erc20_receiver_spend": 90000,
        "erc20_sender_refund": 90000
    }

and also set EURE-PLG20 explicitly to the following, since it uses much more gas, because it's a proxy token

    "gas_limit": {
        "eth_send_erc20": 90000,
        "erc20_payment": 150000,
        "erc20_receiver_spend": 120000,
        "erc20_sender_refund": 120000
    }