Version Bump

[mfurtak]

Changes since release 0.50.3:

• Make small improvements to project run retry code and logging (Make small improvements to project run retry code and logging #6030)
• Timeout and retry xcodebuild -showBuildSettings (Timeout and retry xcodebuild -showBuildSettings #5188)
• Note reason for work-around (Note reason for work-around #6024)
• Add clean to xcodebuild -showBuildSettings to workaround hang with core data projects
• [fastlane] Refactor fastlane runner to make it easy to access from docs ([fastlane] Refactor fastlane runner to make it easy to access from docs #5951)
• Add a ROOT path constant for fastlane_core (Add a ROOT path constant for fastlane_core #5854)

[KrauseFx]

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[nafu]

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