Fix a bug that was causing the DownloadSession to signal that it completed processing early.

Enhance download progress so that we can provide more feedback to users

Updated CI to automatically select Xcode version

Backed down OS version requirements

Update to provide usable JSON decoding error messages.

Merge pull request #28 from Ranchero-Software/revert-27-main

Revert "suppress linker warnings"

Merge pull request #27 from stuartbreckenridge/main

suppress linked warnings

Exposed preparedForOpeningInBrowser API so that it can be used in dependent projects

Removed code that could call the completion handler multiple times

Change how we do percent encoding to allow for more special characters

Add a way to complete multiple tasks at a time

Limit to 500 downloads at a time in a download session

Added comments about why the enhanced percent encoding is needed