[stdlib] Make dictionary.keys.contains(key) O(1) even when wrapping a NSDictionary
[stdlib] Make dictionary.keys.contains(key) O(1) even when wrapping a NSDictionary

shajrawi/swift,brentdax/swift,glessard/swift,stephentyrone/swift,brentdax/swift,roambotics/swift,JGiola/swift,alblue/swift,tkremenek/swift,karwa/swift,natecook1000/swift,hooman/swift,gribozavr/swift,karwa/swift,benlangmuir/swift,xwu/swift,lorentey/swift,nathawes/swift,gregomni/swift,parkera/swift,brentdax/swift,lorentey/swift,stephentyrone/swift,harlanhaskins/swift,CodaFi/swift,hooman/swift,natecook1000/swift,lorentey/swift,jckarter/swift,austinzheng/swift,austinzheng/swift,glessard/swift,karwa/swift,devincoughlin/swift,apple/swift,JGiola/swift,danielmartin/swift,roambotics/swift,huonw/swift,nathawes/swift,stephentyrone/swift,hooman/swift,airspeedswift/swift,stephentyrone/swift,sschiau/swift,airspeedswift/swift,gribozavr/swift,natecook1000/swift,gribozavr/swift,hooman/swift,gribozavr/swift,xedin/swift,harlanhaskins/swift,parkera/swift,jmgc/swift,huonw/swift,gregomni/swift,apple/swift,amraboelela/swift,gribozavr/swift,nathawes/swift,stephentyrone/swift,tkremenek/swift,xwu/swift,allevato/swift,jmgc/swift,atrick/swift,danielmartin/swift,sschiau/swift,JGiola/swift,tkremenek/swift,shahmishal/swift,alblue/swift,jopamer/swift,roambotics/swift,CodaFi/swift,gregomni/swift,lorentey/swift,apple/swift,amraboelela/swift,jckarter/swift,airspeedswift/swift,alblue/swift,tkremenek/swift,JGiola/swift,hooman/swift,huonw/swift,CodaFi/swift,jopamer/swift,airspeedswift/swift,shajrawi/swift,xwu/swift,glessard/swift,devincoughlin/swift,xedin/swift,sschiau/swift,karwa/swift,nathawes/swift,xedin/swift,brentdax/swift,ahoppen/swift,danielmartin/swift,austinzheng/swift,huonw/swift,allevato/swift,rudkx/swift,hooman/swift,benlangmuir/swift,CodaFi/swift,sschiau/swift,jckarter/swift,shahmishal/swift,danielmartin/swift,karwa/swift,sschiau/swift,rudkx/swift,harlanhaskins/swift,atrick/swift,danielmartin/swift,practicalswift/swift,ahoppen/swift,harlanhaskins/swift,karwa/swift,ahoppen/swift,allevato/swift,lorentey/swift,xedin/swift,aschwaighofer/swift,shajrawi/swift,airspeedswift/swift,gribozavr/swift,austinzheng/swift,jmgc/swift,hooman/swift,atrick/swift,harlanhaskins/swift,shajrawi/swift,jckarter/swift,jckarter/swift,CodaFi/swift,roambotics/swift,xwu/swift,benlangmuir/swift,ahoppen/swift,glessard/swift,sschiau/swift,jmgc/swift,parkera/swift,shahmishal/swift,JGiola/swift,natecook1000/swift,devincoughlin/swift,karwa/swift,shajrawi/swift,roambotics/swift,xwu/swift,amraboelela/swift,amraboelela/swift,benlangmuir/swift,practicalswift/swift,stephentyrone/swift,practicalswift/swift,xedin/swift,brentdax/swift,atrick/swift,alblue/swift,shajrawi/swift,apple/swift,parkera/swift,huonw/swift,gregomni/swift,natecook1000/swift,tkremenek/swift,nathawes/swift,gribozavr/swift,shahmishal/swift,austinzheng/swift,natecook1000/swift,xwu/swift,rudkx/swift,aschwaighofer/swift,xwu/swift,aschwaighofer/swift,jckarter/swift,nathawes/swift,tkremenek/swift,ahoppen/swift,devincoughlin/swift,practicalswift/swift,alblue/swift,nathawes/swift,devincoughlin/swift,tkremenek/swift,lorentey/swift,xedin/swift,xedin/swift,allevato/swift,jopamer/swift,shahmishal/swift,devincoughlin/swift,austinzheng/swift,xedin/swift,gregomni/swift,amraboelela/swift,practicalswift/swift,practicalswift/swift,aschwaighofer/swift,harlanhaskins/swift,brentdax/swift,CodaFi/swift,allevato/swift,jmgc/swift,atrick/swift,jopamer/swift,atrick/swift,rudkx/swift,shajrawi/swift,apple/swift,benlangmuir/swift,danielmartin/swift,airspeedswift/swift,huonw/swift,practicalswift/swift,roambotics/swift,jmgc/swift,sschiau/swift,allevato/swift,glessard/swift,CodaFi/swift,austinzheng/swift,ahoppen/swift,amraboelela/swift,alblue/swift,benlangmuir/swift,practicalswift/swift,alblue/swift,lorentey/swift,shajrawi/swift,amraboelela/swift,jopamer/swift,parkera/swift,jmgc/swift,shahmishal/swift,aschwaighofer/swift,glessard/swift,aschwaighofer/swift,JGiola/swift,harlanhaskins/swift,sschiau/swift,karwa/swift,aschwaighofer/swift,jckarter/swift,parkera/swift,airspeedswift/swift,gribozavr/swift,apple/swift,shahmishal/swift,jopamer/swift,devincoughlin/swift,parkera/swift,devincoughlin/swift,rudkx/swift,allevato/swift,brentdax/swift,danielmartin/swift,natecook1000/swift,huonw/swift,parkera/swift,jopamer/swift,lorentey/swift,shahmishal/swift,rudkx/swift,stephentyrone/swift,gregomni/swift