Support 128-bit integers using int_as_string_bitcount

[juls858]

Currently int_as_string_bitcount supports only up to 63bits. Please add support for any bitlength or at least 127(128) bits. Snowflake supports 128bit integers, currently any bigints that I load have to be converted to a string if they are less than 64bits.

ideally all of the following should be stored as a number given the following code:

test = {
    "max_int": 99999999999999999999999999999999999999,
    "63 bits": 999999999999999999,
    "53 bits": 999999999999999,
    "overflow": 999999999999999999999999999999999999991,
}
result = simplejson.dumps(test, int_as_string_bitcount=128)

print(result)

[etrepum]

A patch with tests that implements this would be reviewed and likely accepted.

Depending on how Snowflake's parser handles overflow, you might be able to get away without using int_as_string_bitcount at all. By default any sized integer will be encoded as a number.

>>> print(simplejson.dumps(test, indent=2))
{
  "max_int": 99999999999999999999999999999999999999,
  "63 bits": 999999999999999999,
  "53 bits": 999999999999999,
  "overflow": 999999999999999999999999999999999999991
}