Installation v2.0.0
Install as Unlocked Package
Install the latest version of Async Lib as an unlocked package:
https://login.salesforce.com/packaging/installPackage.apexp?p0=04tP6000002cgEnIAITIP
When installed as a package, all classes use the btcdev namespace prefix (e.g., btcdev.QueueableJob, btcdev.Async). If you use .deepClone(), see Deep Clone in Packages for a required override.
Deploy via Button
Deploy to your Salesforce org using the deploy button:

Copy and Deploy
Or clone the repository and deploy using SFDX:
bash
git clone https://github.com/beyond-the-cloud-dev/async-lib.git
cd async-lib
sf project deploy start -p force-app -u your-org-alias