Move script to zsh

[aschwanb]

Thank you for this great project.

I made a PR that moves the script to zsh. It:

• Moves authentication to the new JAMF workflow using bearer tokens
• Makes the file uploading more securt by disabling the (-k, --insecure) option
• Introduces a breaking change by moving from a whitespace separated list of log files to a list separated by comma ,

This change allows for easy handling of paths with whitespace. E.g. /Library/Managed Installs/Logs/ManagedSoftwareUpdate.log*