Add logic for max_studies > 100

[MatthewChatham]

I was working on a project to pull over a thousand full studies and figured I'd incorporate it into this package.

This is unfortunately a breaking change. I considered returning the dict if max_studies was between 1 and 100 but thought it might be an unnecessary complication.

[MatthewChatham]

@jvfe let me know if you have any questions or comments. Happy to implement similar functionality for the other endpoints if desired.