Support for BigInt, BigDecimal datatypes

[shwetaudacious]

Describe the bug

Datatypes such as BigInt, BigDecimal could not be represented in a graphical format. When I'm trying to integrate various graphs with values such as BigInt from the graphQL data sources. The error shows as "no graphable fields " or "no data". Below is a sample output from a datasource playground.

Below is the response from Query inspector

Expected behavior
Values of datatypes such as BigInt and BigDecimal fetched from a graphQL to be represented in the graphs.