Added the MoneyOverflow error code

We've added the MoneyOverflow error code to help identify instances when a Money operation has failed due to an integer overflow.

Both centAmount (applicable to all money types), as well as preciseAmount (for high precision money types) are represented as 64-bit integers. If a Money operation results in either object exceeding the 64-bit limit, the API returns a 400 Bad Request with the MoneyOverflow error code.

Changes:

• [API] Added the MoneyOverflow error code.