Remove bintrees from dependencies
Remove bintrees from dependencies

The package fails to install on Python 3.7 (with a compilation issue),
and is deprecated in favor of sortedcontainers.

StuartLittlefair/astropy,astropy/astropy,aleksandr-bakanov/astropy,saimn/astropy,dhomeier/astropy,StuartLittlefair/astropy,saimn/astropy,mhvk/astropy,pllim/astropy,aleksandr-bakanov/astropy,bsipocz/astropy,lpsinger/astropy,pllim/astropy,bsipocz/astropy,larrybradley/astropy,dhomeier/astropy,StuartLittlefair/astropy,astropy/astropy,larrybradley/astropy,saimn/astropy,stargaser/astropy,dhomeier/astropy,stargaser/astropy,StuartLittlefair/astropy,mhvk/astropy,lpsinger/astropy,pllim/astropy,dhomeier/astropy,mhvk/astropy,astropy/astropy,MSeifert04/astropy,larrybradley/astropy,astropy/astropy,lpsinger/astropy,bsipocz/astropy,astropy/astropy,stargaser/astropy,lpsinger/astropy,saimn/astropy,aleksandr-bakanov/astropy,MSeifert04/astropy,mhvk/astropy,MSeifert04/astropy,larrybradley/astropy,dhomeier/astropy,bsipocz/astropy,saimn/astropy,pllim/astropy,MSeifert04/astropy,pllim/astropy,mhvk/astropy,larrybradley/astropy,StuartLittlefair/astropy,aleksandr-bakanov/astropy,stargaser/astropy,lpsinger/astropy