Attribute Values Can Only Be Strings

[blakeromano]

Is your feature request related to a problem? Please describe.
In the SDK I can only add attribute values as key value strings and not be able to have numbers, booleans, etc; be evaluated properly through SDK.

Describe the solution you'd like
I'd like to have attribute values type to change to be a Record<string|number|boolean....>

Describe alternatives you've considered
N/A

Additional context
N/A