Update CI 4.1.9 to Ci 4.2.1 via composer

@chakycool I have responded to your issue in the repo: https://github.com/tattersoftware/codeig.../issues/26

If you gather the requested info I am happy to help more. My guess is either your starting point was not a healthy installation of CI4 (did not have Composer packages installed, switched from develop to release, altered paths/subdirectories) or you have included your **vendor/** folder in the repo.