I never heard back but I was able to track down the code for the QuickTask on GitHub.
Here is the source for it:
Here is an issue post that details what changes to the code need to be made for it to work with Alfred 3:
“…this needs some modification to work with Alfred 3. workflow.php calls for Alfred 2 directories. Do a find and replace, replacing Alfred-2 with Alfred-3, and replacing Alfred 2 with Alfred 3. After that everything will work like it’s supposed to.”
It will work with Personal Access Tokens (not the API Key as it will be deprecated):
My Profile Settings > Apps > Manage Developer Apps > Create New Personal Access Token