parseAsync does not handle exponential floating point numbers

[latish]

Describe the bug
parseAsync throws error when json contains exponential number

To Reproduce

const a = JSON.parse('{"dx": 8.97569134394871e-06}')
     console.log(a)
     let item = await parseAsync('{"dx": 8.97569134394871e-06}')
// throws exception:     Error: state INIT, unexpected token e
     console.log(item)

Expected behavior
Should be able to parse exponential number
{ dx: 0.00000897569134394871 }

Additional context
Run using Node 14.9