Use correct Amount type for InstantAvailable

[jheth]

Fixes #1202

[ERROR] Couldn't deserialize JSON (response status: 200, body sample: '{\n "object": "balance",\n "available": [\n {\n "amount": 118300,\n "currency": "usd",\n "source_types": {\n "card": 118300\n }\n }\n ],\n "instant_available": [\n {\n "amount": 118300,\n "currency": "usd",\n "source_types": {\n "card": 118300\n }\n }\n ],\n "livemode": false,\n "pending": [\n {\n "amount": 0,\n "currency": "usd",\n "source_types": {\n "card": 0\n }\n }\n ]\n}\n'): json: cannot unmarshal array into Go struct field Balance.instant_available of type stripe.BalanceDetails

It needs to be []*Amount instead of *BalanceDetails

[CLAassistant]

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[richardm-stripe]

Thanks for the fix @jheth, this is released in v72.12.1