Build Cache for React Native v0.5.6

[system]

What’s Changed

• Bump bitrise-build-cache-cli to v2.4.8: jitpack mirror disabled (returning 401 upstream) and gradle-mirrors activation now warns when the project uses apply(from = ...) (mirror scope-gap).

Release 0.5.6 · bitrise-steplib/bitrise-step-activate-react-native-features