I checked the repository on cgit and see that the files show up as lowercase....

I checked the repository on cgit and see that the files show up as lowercase. I tried on a local viewer and it is lowercase there too. To be extra sure, I cloned the repository fresh and the files were created with lowercase name.

Finally, I tried the package release on drupal.org and I see it is lowercase inside the tar file as well.

So, my guess is you are using the git repository and pull the changes. Since all fresh attempts to get the module give the lower case filename, I think we should keep it that way.

I'd suggest you to download a fresh tar file or clone it fresh depending on how you have set it up. +1 to mark this as "Closed (Works as designed)"