Added Weaver to the list of projects using Stencil

[trupin]

I added Weaver, which is another cool project with code generation features built with Stencil.

Weaver is a declarative, easy-to-use and safe Dependency Injection framework for Swift.

• Declarative because it allows to declare dependencies via annotations directly in the Swift code.
• Easy-to-use because it generates the necessary boilerplate code to inject dependencies into Swift types.
• Safe because it validates the dependency graph at compile time and outputs a nice XCode error when something's wrong.

You can check it out on GitHub: https://github.com/scribd/Weaver

I also wrote this article explaining why I developed it: https://medium.com/scribd-data-science-engineering/weaver-a-painless-dependency-injection-framework-for-swift-7c4afad5ef6a