* Stabilize sorting of groups with duplicate names/paths
For example, previously a group with (name: nil, path: "Sources") would be considered equal to (name: "Sources", path: "../Sources"), even though they are distinct groups.
* Remove Comparable conformance from PBXFileElement
...as it isn't compatible with its Equatable conformance.
Renamed localizedStandardCompare to reflect the fact that PBXFileElement no longer has an inherent order.
* Update changelog
yonaskolb
Liam Nichols
Christopher Rogers
Evan Coleman
Yuta Saito
Kohki Miki