Added location option to test target (#1153)

* Added location option to test target

* Updated XcodeProj

* Updated packages

* Removed extra toJSONValue()

* Update Docs/ProjectSpec.md

Co-authored-by: Yonas Kolb <yonaskolb@users.noreply.github.com>

* Update Sources/ProjectSpec/Scheme.swift

Co-authored-by: Yonas Kolb <yonaskolb@users.noreply.github.com>

* Update Sources/ProjectSpec/Scheme.swift

Co-authored-by: Yonas Kolb <yonaskolb@users.noreply.github.com>

* Removed optional location

* Renamed SimulateLocation to Location

* Removed Location struct and just pass location string directly

* Added tests for location with a test target

* Added example of location inside test target to project.yml

* Removed extra test target and add location to existing target

* Updated App_Scheme.xcscheme

Co-authored-by: Yonas Kolb <yonaskolb@users.noreply.github.com>