Inconsistent unique_cut default value in variance_threshold vs feature_select

[alxndrkalinin]

I noticed that variance_threshold always had unique_cut=0.01 as a default, while feature_select later set more strict default unique_cut=0.1, overriding that of variance_threshold.

I'm wondering if this default change was a typo or had a reason and what default setting should suit most projects.

[gwaybio]

thanks @alxndrkalinin ! I think this is a typo. Feel free to file a PR to keep the default consistent. Most folks invoke variance_threshold through feature_select() so it's probably best to change the default in variance_threshold.

[alxndrkalinin]

@gwaybio here you go #283