6.1.0

What's Changed

• Auto-wrap xcodebuild invocations via bitrise-build-cache react-native run when React Native build cache is active on the machine. The xcodebuild calls inside this step become children of the active RN parent invocation. Killswitch: BITRISE_BUILD_CACHE_RN_WRAP=0. (#421, #424)
• Migrate sliceutil v1 → v2. (#422)