More Flexible Function Arguments for Throttle

[jwhenry3]

throttle(fetch) is having a typescript definition issue right now due to lack of flexibility with the definitions.

On index.d.ts on line 13~14 and 80~81:
Rather than having Argument in the defs, change it to Arguments, and rather than returning ...arguments:Argument[], have it return ...arguments: Arguments. This should resolve its lack of flexibility. I too would be willing to dive in and open a PR if necessary.

[jwhenry3]

As of 4.1.1 we are no longer seeing this issue. Please disregard.