Support field selection

[KazimirPodolski]

Is your feature request related to a problem? Please describe.
Looks like field selection is not supported by this SDK (or I cannot figure out how to use it).

Describe the solution you'd like
Support select parameter where applicable.

Describe alternatives you've considered
Currently using it as it is, not cool querying pages of full messages when I only needed IDs.

Additional context
Also it's unclear how and when I can get in trouble if I just query full messages with bodies and whatnot, and never worry of select.

Field selection helps to reduce the size of Nylas' response, improves latency, and helps you avoid rate limiting issues.

is too vague.