RequestsJSONDecodeError returned when nylas has a 502

[ilya-tkachov]

Describe the bug
When nylas has an internal server error, a RequestsJSONDecodeError is returned

To Reproduce
Run any API until nylas returns a 502...? The code for this specifically was running messages.list

// Helps us with reproducing the error :)

Expected behavior
Returns a NylasApiError instead of RequestsJSONDecodeError

SDK Version:
6.4.0

Additional context