You first need to make sure you have PurrNet v1.14.0 or higher installed as PurrDiction uses PurrNet to function.
Git through Package Manager
Through the package manager you can add a package using a git URL. Just add the following URL, and whenever you need PurrDiction updated, you can update it directly from the package manager:
You can also use the dev branch if you're looking to access the latest features, though it may come at the cost of stability. You can switch at any time by using either URLs: