make BIF signatures more expressive for kwargs
make BIF signatures more expressive for kwargs

silvaemota/stylus,tyv/stylus,trixter5/stylus,stylus/stylus,HossainKhademian/Stylus,angryrobot/stylus,jangarcia/stylus,a-x-/stylus,darwin/stylus,Delapouite/stylus,behzad88/stylus,jonpacker/stylus,modulexcite/stylus,galenvagen/stylus,SimenB/stylus,cemoulto/stylus,Ricardh522/stylus,yetone/stylus,isaacs/stylus,Zagorakiss/stylus,meteor/stylus,Panya/stylus,PeterWangPo/stylus,peterkinalex/stylus-1,rstacruz/stylus,johnnycopperstone/stylus,baotingfang/stylus,jameswomack/stylus,ThiagoGarciaAlves/stylus