Integer is not Num, only Float is

[evaporei]

let jsonObj: JSON.Obj = <JSON.Obj>(JSON.parse('{"value": 24}'));
let value: JSON.Value = jsonObj.getValue("value")!;

assert(!value.isNum)
assert(value.isInteger)

jsonObj = <JSON.Obj>(JSON.parse('{"value": 4.2}'));
value = jsonObj.getValue("value")!;

assert(value.isNum)
assert(value.isFloat)

This happens because only Float extends Num, Integer doesn't extend it.

I'm only pointing this out because the README.md's example is incorrect, since the JSON parsed in it has an Integer and not a Num:

{"hello": "world", "value": 24}