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Don't add `PBXContainerItemProxy` when reusing `PBXReferenceProxy` (#1377)

* Reproduce issue in FixtureTests

* Don't add PBXContainerItemProxy if existing PBXReferenceProxy was reused

* Move extenral target fixture to an iOS target so that it actually compiles

* Update CHANGELOG.md
L
Liam Nichols committed
98ce05105bf40f85bf6e15fe9f8fabce3de6d76d
Parent: af1adfe
Committed by GitHub <noreply@github.com> on 7/26/2023, 12:52:43 PM