Investigate conditional type depending on beautifier enabled setting

[tiagosiebler]

Depending on whether the beautifier is enabled, some numbers may be strings:
https://github.com/tiagosiebler/binance/blob/v2.0.0/beta/src/types/shared.ts#L1-L3

binance/src/util/requestUtils.ts

Line 38 in 09cc8f1

beautifyResponses?: boolean;

Would love to conditionally set the type to number or string, depending on the state of that setting. There must be a way...

[tiagosiebler]

See #226