Feature request to (optionally) support "Python JSON" number extensions

[ljwall]

It would be really great if Aeson was able to parse (and re-serialize) JSON generated with the Python json module, which has some extra (non-spec) features with regard to numbers:

import json
import math

print(
    json.dumps(
        {
            "foo": 99,
            "bar": math.nan,
            "baz": -math.inf
        }
    )
)

which yields

{"foo": 99, "bar": NaN, "baz": -Infinity}

I think NaN, Infinity and -Infinity are the only extra tokens that occur.

For me personally this comes up when working with JSON generated by data-scientists, where Python is the main language and these values seem to occur often.