SwifterPM 0.8.12: skip __MACOSX shadows and stream resolve output

The SwiftPM integration has been bumped to SwifterPM 0.8.12, which fixes two things that affected Tuist users: extracting a Finder-zipped binary artifact (such as Plaid’s LinkKit) no longer picks up the __MACOSX/ AppleDouble shadow of every bundle, so tuist generate against packages that ship those archives completes instead of aborting with “doesn’t contain an Info.plist”. Resolve output streamed from delegated swift package resolve runs is now forwarded to the terminal, so cuts and reinstalls show SwiftPM progress instead of appearing stalled.