Confidence Interval for Macro-F1 is always [0,1]

[vsocrates]

Hi,

Thanks for a great library! How come the macro-f1 has been hardcoded with a CI of [0,1] in this line?

https://github.com/jacobgil/confidenceinterval/blob/7b47bfdf0ce8ec54a2a2d820b7332fd43b15d0d0/confidenceinterval/metrics.py#L527-L528

I believe we should be using the equation from the paper to compute first variance, then computing the CI from that. Thanks!