Improvements

* Add a new experimental execution strategy to ItunesTransporter to verify a fix for passwords with special characters
    * Use the environment variable FASTLANE_EXPERIMENTAL_TRANSPORTER_AVOID_SHELL_SCRIPT=true to turn it on
    * See: https://github.com/fastlane/fastlane/pull/4003

https://github.com/fastlane/fastlane_core/releases/tag/0.41.1
