Changes XCode version in CircleCI.
Changes XCode version in CircleCI.

Hxucaa/ReactiveArray,jersonperpetua/ReactiveArray,jersonperpetua/ReactiveArray,Hxucaa/ReactiveArray,Adlai-Holler/ReactiveArray,Hxucaa/ReactiveArray,Adlai-Holler/ReactiveArray,Wolox/ReactiveArray,Wolox/ReactiveArray,Adlai-Holler/ReactiveArray,jersonperpetua/ReactiveArray,Wolox/ReactiveArray,Hxucaa/ReactiveArray,Adlai-Holler/ReactiveArray