• The --swift_whole_module_optimization flag was removed from Bazel. Use --swiftcopt=-whole-module-optimization instead for the same effect.
• swift_library now generates a module map for the header that it generates for Objective-C interop.
• The bundling rules validate app_icons and launch_images attributes to help catch glob() usage that isn't catching what was intended.
• Additional validation improvements and bug fixes (details).